diff --git a/mozilla/content/base/src/nsSyncLoadService.cpp b/mozilla/content/base/src/nsSyncLoadService.cpp
index b117e9653c9..ad970fbe725 100644
--- a/mozilla/content/base/src/nsSyncLoadService.cpp
+++ b/mozilla/content/base/src/nsSyncLoadService.cpp
@@ -38,6 +38,8 @@
 #include "nsIDOMWindowInternal.h"
 #include "nsAppShellCIDs.h"
 #include "nsIAppShellService.h"
+#include "nsIDocShellTreeOwner.h"
+#include "nsIInterfaceRequestor.h"
 
 static const char* kLoadAsData = "loadAsData";
 
@@ -157,9 +159,8 @@ nsSyncLoader::~nsSyncLoader()
     //if (XML_HTTP_REQUEST_SENT == mStatus) {
     //    Abort();
     //}
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-    }
+    if (mChromeWindow)
+        mChromeWindow->ExitModalEventLoop(NS_OK);
 }
 
 NS_IMPL_ISUPPORTS3(nsSyncLoader, nsISyncLoader, nsIDOMLoadListener, nsISupportsWeakReference)
@@ -275,9 +276,16 @@ nsSyncLoader::LoadDocument(nsIURI* documentURI, nsIDOMDocument **_retval)
         nsCOMPtr<nsIDocShellTreeItem> item = do_QueryInterface(docshell);
         if (!item) return NS_ERROR_FAILURE;
 
-        rv = item->GetTreeOwner(getter_AddRefs(mDocShellTreeOwner));
+        nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+        rv = item->GetTreeOwner(getter_AddRefs(treeOwner));
         if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
 
+        nsCOMPtr<nsIInterfaceRequestor> treeRequestor(do_GetInterface(treeOwner));
+        if (!treeRequestor) return NS_ERROR_FAILURE;
+
+        treeRequestor->GetInterface(NS_GET_IID(nsIWebBrowserChrome), getter_AddRefs(mChromeWindow));
+        if (mChromeWindow) return NS_ERROR_FAILURE;
+
         eventQService = do_GetService(kEventQueueServiceCID);
         if(!eventQService || 
            NS_FAILED(eventQService->PushThreadEventQueue(getter_AddRefs(modalEventQueue)))) {
@@ -308,8 +316,8 @@ nsSyncLoader::LoadDocument(nsIURI* documentURI, nsIDOMDocument **_retval)
     }  
 
     // Spin an event loop here and wait
-    if (mDocShellTreeOwner) {
-        rv = mDocShellTreeOwner->ShowModal();
+    if (mChromeWindow) {
+        rv = mChromeWindow->ShowAsModal();
     
         eventQService->PopThreadEventQueue(modalEventQueue);
     
@@ -332,9 +340,9 @@ nsSyncLoader::HandleEvent(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Load(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
@@ -349,9 +357,9 @@ nsSyncLoader::Unload(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Abort(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
@@ -360,9 +368,9 @@ nsSyncLoader::Abort(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Error(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
diff --git a/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.cpp b/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.cpp
index b117e9653c9..ad970fbe725 100644
--- a/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.cpp
+++ b/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.cpp
@@ -38,6 +38,8 @@
 #include "nsIDOMWindowInternal.h"
 #include "nsAppShellCIDs.h"
 #include "nsIAppShellService.h"
+#include "nsIDocShellTreeOwner.h"
+#include "nsIInterfaceRequestor.h"
 
 static const char* kLoadAsData = "loadAsData";
 
@@ -157,9 +159,8 @@ nsSyncLoader::~nsSyncLoader()
     //if (XML_HTTP_REQUEST_SENT == mStatus) {
     //    Abort();
     //}
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-    }
+    if (mChromeWindow)
+        mChromeWindow->ExitModalEventLoop(NS_OK);
 }
 
 NS_IMPL_ISUPPORTS3(nsSyncLoader, nsISyncLoader, nsIDOMLoadListener, nsISupportsWeakReference)
@@ -275,9 +276,16 @@ nsSyncLoader::LoadDocument(nsIURI* documentURI, nsIDOMDocument **_retval)
         nsCOMPtr<nsIDocShellTreeItem> item = do_QueryInterface(docshell);
         if (!item) return NS_ERROR_FAILURE;
 
-        rv = item->GetTreeOwner(getter_AddRefs(mDocShellTreeOwner));
+        nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+        rv = item->GetTreeOwner(getter_AddRefs(treeOwner));
         if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
 
+        nsCOMPtr<nsIInterfaceRequestor> treeRequestor(do_GetInterface(treeOwner));
+        if (!treeRequestor) return NS_ERROR_FAILURE;
+
+        treeRequestor->GetInterface(NS_GET_IID(nsIWebBrowserChrome), getter_AddRefs(mChromeWindow));
+        if (mChromeWindow) return NS_ERROR_FAILURE;
+
         eventQService = do_GetService(kEventQueueServiceCID);
         if(!eventQService || 
            NS_FAILED(eventQService->PushThreadEventQueue(getter_AddRefs(modalEventQueue)))) {
@@ -308,8 +316,8 @@ nsSyncLoader::LoadDocument(nsIURI* documentURI, nsIDOMDocument **_retval)
     }  
 
     // Spin an event loop here and wait
-    if (mDocShellTreeOwner) {
-        rv = mDocShellTreeOwner->ShowModal();
+    if (mChromeWindow) {
+        rv = mChromeWindow->ShowAsModal();
     
         eventQService->PopThreadEventQueue(modalEventQueue);
     
@@ -332,9 +340,9 @@ nsSyncLoader::HandleEvent(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Load(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
@@ -349,9 +357,9 @@ nsSyncLoader::Unload(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Abort(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
@@ -360,9 +368,9 @@ nsSyncLoader::Abort(nsIDOMEvent* aEvent)
 nsresult
 nsSyncLoader::Error(nsIDOMEvent* aEvent)
 {
-    if (mDocShellTreeOwner) {
-        mDocShellTreeOwner->ExitModalLoop(NS_OK);
-        mDocShellTreeOwner = 0;
+    if (mChromeWindow) {
+        mChromeWindow->ExitModalEventLoop(NS_OK);
+        mChromeWindow = 0;
     }
 
     return NS_OK;
diff --git a/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.h b/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.h
index 6fbb08e893e..a541daad0b7 100644
--- a/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.h
+++ b/mozilla/extensions/transformiix/source/xml/parser/nsSyncLoader.h
@@ -30,7 +30,7 @@
 #include "nsString.h"
 #include "nsIDOMLoadListener.h"
 #include "nsIDocument.h"
-#include "nsIDocShellTreeOwner.h"
+#include "nsIWebBrowserChrome.h"
 #include "nsWeakReference.h"
 #include "nsISyncLoader.h"
 
@@ -56,7 +56,7 @@ public:
     virtual nsresult Error(nsIDOMEvent* aEvent);
 
 protected:
-    nsCOMPtr<nsIDocShellTreeOwner> mDocShellTreeOwner;
+    nsCOMPtr<nsIWebBrowserChrome> mChromeWindow;
 };
 
 #endif
diff --git a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
index 0f19893e025..4dc9379553d 100644
--- a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
+++ b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.cpp
@@ -52,7 +52,9 @@
 #include "nsIScriptGlobalObject.h"
 #include "nsIDocShell.h"
 #include "nsIDocShellTreeItem.h"
+#include "nsIDocShellTreeOwner.h"
 #include "nsIEventQueueService.h"
+#include "nsIInterfaceRequestor.h"
 #endif
 
 static const char* kLoadAsData = "loadAsData";
@@ -275,8 +277,8 @@ nsXMLHttpRequest::~nsXMLHttpRequest()
     Abort();
   }    
 #ifdef IMPLEMENT_SYNC_LOAD
-  if (mDocShellTreeOwner) {
-    mDocShellTreeOwner->ExitModalLoop(NS_OK);
+  if (mChromeWindow) {
+    mChromeWindow->ExitModalEventLoop(NS_OK);
   }
 #endif
 }
@@ -1242,9 +1244,16 @@ nsXMLHttpRequest::Send(nsISupports *body)
       nsCOMPtr<nsIDocShellTreeItem> item = do_QueryInterface(docshell);
       if (!item) return NS_ERROR_FAILURE;
 
-      rv = item->GetTreeOwner(getter_AddRefs(mDocShellTreeOwner));
+      nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+      rv = item->GetTreeOwner(getter_AddRefs(treeOwner));
       if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
 
+      nsCOMPtr<nsIInterfaceRequestor> treeRequestor(do_GetInterface(treeOwner));
+      if (!treeRequestor) return NS_ERROR_FAILURE;
+
+      treeRequestor->GetInterface(NS_GET_IID(nsIWebBrowserChrome), getter_AddRefs(mChromeWindow));
+      if (!mChromeWindow) return NS_ERROR_FAILURE;
+
       eventQService = do_GetService(kEventQueueServiceCID);
       if(!eventQService || 
          NS_FAILED(eventQService->PushThreadEventQueue(getter_AddRefs(modalEventQueue)))) {
@@ -1288,8 +1297,8 @@ nsXMLHttpRequest::Send(nsISupports *body)
 
 #ifdef IMPLEMENT_SYNC_LOAD
   // If we're synchronous, spin an event loop here and wait
-  if (!mAsync && mDocShellTreeOwner) {
-    rv = mDocShellTreeOwner->ShowModal();
+  if (!mAsync && mChromeWindow) {
+    rv = mChromeWindow->ShowAsModal();
     
     eventQService->PopThreadEventQueue(modalEventQueue);
     
@@ -1326,9 +1335,9 @@ nsXMLHttpRequest::Load(nsIDOMEvent* aEvent)
 {
   mStatus = XML_HTTP_REQUEST_COMPLETED;
 #ifdef IMPLEMENT_SYNC_LOAD
-  if (mDocShellTreeOwner) {
-    mDocShellTreeOwner->ExitModalLoop(NS_OK);
-    mDocShellTreeOwner = 0;
+  if (mChromeWindow) {
+    mChromeWindow->ExitModalEventLoop(NS_OK);
+    mChromeWindow = 0;
   }
 #endif
   if (mLoadEventListeners) {
@@ -1360,9 +1369,9 @@ nsXMLHttpRequest::Abort(nsIDOMEvent* aEvent)
 {
   mStatus = XML_HTTP_REQUEST_ABORTED;
 #ifdef IMPLEMENT_SYNC_LOAD
-  if (mDocShellTreeOwner) {
-    mDocShellTreeOwner->ExitModalLoop(NS_OK);
-    mDocShellTreeOwner = 0;
+  if (mChromeWindow) {
+    mChromeWindow->ExitModalEventLoop(NS_OK);
+    mChromeWindow = 0;
   }
 #endif
 
@@ -1374,9 +1383,9 @@ nsXMLHttpRequest::Error(nsIDOMEvent* aEvent)
 {
   mStatus = XML_HTTP_REQUEST_ABORTED;
 #ifdef IMPLEMENT_SYNC_LOAD
-  if (mDocShellTreeOwner) {
-    mDocShellTreeOwner->ExitModalLoop(NS_OK);
-    mDocShellTreeOwner = 0;
+  if (mChromeWindow) {
+    mChromeWindow->ExitModalEventLoop(NS_OK);
+    mChromeWindow = 0;
   }
 #endif
   if (mErrorEventListeners) {
diff --git a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.h b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.h
index 41e8e4e5c5f..09d70308061 100644
--- a/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.h
+++ b/mozilla/extensions/xmlextras/base/src/nsXMLHttpRequest.h
@@ -37,7 +37,7 @@
 #include "nsIDocument.h"
 #include "nsIStreamListener.h"
 #ifdef IMPLEMENT_SYNC_LOAD
-#include "nsIDocShellTreeOwner.h"
+#include "nsIWebBrowserChrome.h"
 #endif
 #include "nsWeakReference.h"
 #include "nsISupportsArray.h"
@@ -101,7 +101,7 @@ protected:
   nsCOMPtr<nsIURI> mBaseURI;
   nsCOMPtr<nsIDocument> mBaseDocument;
 #ifdef IMPLEMENT_SYNC_LOAD
-  nsCOMPtr<nsIDocShellTreeOwner> mDocShellTreeOwner;
+  nsCOMPtr<nsIWebBrowserChrome> mChromeWindow;
 #endif
   nsCOMPtr<nsISupportsArray> mLoadEventListeners;
   nsCOMPtr<nsISupportsArray> mErrorEventListeners;