diff --git a/mozilla/content/shared/public/nsLayoutAtoms.h b/mozilla/content/shared/public/nsLayoutAtoms.h
index 366a80d680a..f13bc47554e 100644
--- a/mozilla/content/shared/public/nsLayoutAtoms.h
+++ b/mozilla/content/shared/public/nsLayoutAtoms.h
@@ -69,6 +69,7 @@ public:
   static nsIAtom* blockFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* pageFrame;
+  static nsIAtom* placeholderFrame;
   static nsIAtom* positionedInlineFrame;
   static nsIAtom* rootFrame;
   static nsIAtom* scrollFrame;
diff --git a/mozilla/content/shared/src/nsLayoutAtoms.cpp b/mozilla/content/shared/src/nsLayoutAtoms.cpp
index 1ab695933ad..94af420a1ee 100644
--- a/mozilla/content/shared/src/nsLayoutAtoms.cpp
+++ b/mozilla/content/shared/src/nsLayoutAtoms.cpp
@@ -55,6 +55,7 @@ nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::pageFrame;
+nsIAtom* nsLayoutAtoms::placeholderFrame;
 nsIAtom* nsLayoutAtoms::positionedInlineFrame;
 nsIAtom* nsLayoutAtoms::rootFrame;
 nsIAtom* nsLayoutAtoms::scrollFrame;
@@ -102,6 +103,7 @@ void nsLayoutAtoms::AddrefAtoms()
     blockFrame = NS_NewAtom("BlockFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     pageFrame = NS_NewAtom("PageFrame");
+    placeholderFrame = NS_NewAtom("PlaceholderFrame");
     positionedInlineFrame = NS_NewAtom("PositionedInlineFrame");
     rootFrame = NS_NewAtom("RootFrame");
     scrollFrame = NS_NewAtom("ScrollFrame");
@@ -151,6 +153,7 @@ void nsLayoutAtoms::ReleaseAtoms()
     NS_RELEASE(blockFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(pageFrame);
+    NS_RELEASE(placeholderFrame);
     NS_RELEASE(positionedInlineFrame);
     NS_RELEASE(rootFrame);
     NS_RELEASE(scrollFrame);
diff --git a/mozilla/layout/base/nsLayoutAtoms.cpp b/mozilla/layout/base/nsLayoutAtoms.cpp
index 1ab695933ad..94af420a1ee 100644
--- a/mozilla/layout/base/nsLayoutAtoms.cpp
+++ b/mozilla/layout/base/nsLayoutAtoms.cpp
@@ -55,6 +55,7 @@ nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::pageFrame;
+nsIAtom* nsLayoutAtoms::placeholderFrame;
 nsIAtom* nsLayoutAtoms::positionedInlineFrame;
 nsIAtom* nsLayoutAtoms::rootFrame;
 nsIAtom* nsLayoutAtoms::scrollFrame;
@@ -102,6 +103,7 @@ void nsLayoutAtoms::AddrefAtoms()
     blockFrame = NS_NewAtom("BlockFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     pageFrame = NS_NewAtom("PageFrame");
+    placeholderFrame = NS_NewAtom("PlaceholderFrame");
     positionedInlineFrame = NS_NewAtom("PositionedInlineFrame");
     rootFrame = NS_NewAtom("RootFrame");
     scrollFrame = NS_NewAtom("ScrollFrame");
@@ -151,6 +153,7 @@ void nsLayoutAtoms::ReleaseAtoms()
     NS_RELEASE(blockFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(pageFrame);
+    NS_RELEASE(placeholderFrame);
     NS_RELEASE(positionedInlineFrame);
     NS_RELEASE(rootFrame);
     NS_RELEASE(scrollFrame);
diff --git a/mozilla/layout/base/nsLayoutAtoms.h b/mozilla/layout/base/nsLayoutAtoms.h
index 366a80d680a..f13bc47554e 100644
--- a/mozilla/layout/base/nsLayoutAtoms.h
+++ b/mozilla/layout/base/nsLayoutAtoms.h
@@ -69,6 +69,7 @@ public:
   static nsIAtom* blockFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* pageFrame;
+  static nsIAtom* placeholderFrame;
   static nsIAtom* positionedInlineFrame;
   static nsIAtom* rootFrame;
   static nsIAtom* scrollFrame;
diff --git a/mozilla/layout/base/public/nsLayoutAtoms.h b/mozilla/layout/base/public/nsLayoutAtoms.h
index 366a80d680a..f13bc47554e 100644
--- a/mozilla/layout/base/public/nsLayoutAtoms.h
+++ b/mozilla/layout/base/public/nsLayoutAtoms.h
@@ -69,6 +69,7 @@ public:
   static nsIAtom* blockFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* pageFrame;
+  static nsIAtom* placeholderFrame;
   static nsIAtom* positionedInlineFrame;
   static nsIAtom* rootFrame;
   static nsIAtom* scrollFrame;
diff --git a/mozilla/layout/base/src/nsLayoutAtoms.cpp b/mozilla/layout/base/src/nsLayoutAtoms.cpp
index 1ab695933ad..94af420a1ee 100644
--- a/mozilla/layout/base/src/nsLayoutAtoms.cpp
+++ b/mozilla/layout/base/src/nsLayoutAtoms.cpp
@@ -55,6 +55,7 @@ nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::pageFrame;
+nsIAtom* nsLayoutAtoms::placeholderFrame;
 nsIAtom* nsLayoutAtoms::positionedInlineFrame;
 nsIAtom* nsLayoutAtoms::rootFrame;
 nsIAtom* nsLayoutAtoms::scrollFrame;
@@ -102,6 +103,7 @@ void nsLayoutAtoms::AddrefAtoms()
     blockFrame = NS_NewAtom("BlockFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     pageFrame = NS_NewAtom("PageFrame");
+    placeholderFrame = NS_NewAtom("PlaceholderFrame");
     positionedInlineFrame = NS_NewAtom("PositionedInlineFrame");
     rootFrame = NS_NewAtom("RootFrame");
     scrollFrame = NS_NewAtom("ScrollFrame");
@@ -151,6 +153,7 @@ void nsLayoutAtoms::ReleaseAtoms()
     NS_RELEASE(blockFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(pageFrame);
+    NS_RELEASE(placeholderFrame);
     NS_RELEASE(positionedInlineFrame);
     NS_RELEASE(rootFrame);
     NS_RELEASE(scrollFrame);