diff --git a/mozilla/content/events/public/nsIEventStateManager.h b/mozilla/content/events/public/nsIEventStateManager.h
index fc18965ba1b..079c8da3ab8 100644
--- a/mozilla/content/events/public/nsIEventStateManager.h
+++ b/mozilla/content/events/public/nsIEventStateManager.h
@@ -167,5 +167,9 @@ public:
 #define NS_EVENT_STATE_REQUIRED     0x00000100
 #define NS_EVENT_STATE_OPTIONAL     0x00000200
 #define NS_EVENT_STATE_VISITED      0x00000400
+#define NS_EVENT_STATE_VALID        0x00000800
+#define NS_EVENT_STATE_INVALID      0x00001000
+#define NS_EVENT_STATE_INRANGE      0x00002000
+#define NS_EVENT_STATE_OUTOFRANGE   0x00004000
 
 #endif // nsIEventStateManager_h__
diff --git a/mozilla/layout/style/nsCSSPseudoClassList.h b/mozilla/layout/style/nsCSSPseudoClassList.h
index 158d7dcd176..e40e0cd183d 100644
--- a/mozilla/layout/style/nsCSSPseudoClassList.h
+++ b/mozilla/layout/style/nsCSSPseudoClassList.h
@@ -80,3 +80,7 @@ CSS_PSEUDO_CLASS(onlyChild, ":only-child")
 // http://www.w3.org/TR/2004/CR-css3-ui-20040511/#pseudo-classes
 CSS_PSEUDO_CLASS(required, ":required")
 CSS_PSEUDO_CLASS(optional, ":optional")
+CSS_PSEUDO_CLASS(valid, ":valid")
+CSS_PSEUDO_CLASS(invalid, ":invalid")
+CSS_PSEUDO_CLASS(inRange, ":in-range")
+CSS_PSEUDO_CLASS(outOfRange, ":out-of-range")
diff --git a/mozilla/layout/style/nsCSSStyleSheet.cpp b/mozilla/layout/style/nsCSSStyleSheet.cpp
index 86f3616c9b9..07d1ad0d945 100644
--- a/mozilla/layout/style/nsCSSStyleSheet.cpp
+++ b/mozilla/layout/style/nsCSSStyleSheet.cpp
@@ -3140,6 +3140,18 @@ static PRBool SelectorMatches(RuleProcessorData &data,
     else if (nsCSSPseudoClasses::optional == pseudoClass->mAtom) {
       result = STATE_CHECK(NS_EVENT_STATE_OPTIONAL);
     }
+    else if (nsCSSPseudoClasses::valid == pseudoClass->mAtom) {
+      result = STATE_CHECK(NS_EVENT_STATE_VALID);
+    }
+    else if (nsCSSPseudoClasses::invalid == pseudoClass->mAtom) {
+      result = STATE_CHECK(NS_EVENT_STATE_INVALID);
+    }
+    else if (nsCSSPseudoClasses::inRange == pseudoClass->mAtom) {
+      result = STATE_CHECK(NS_EVENT_STATE_INRANGE);
+    }
+    else if (nsCSSPseudoClasses::outOfRange == pseudoClass->mAtom) {
+      result = STATE_CHECK(NS_EVENT_STATE_OUTOFRANGE);
+    }
     else {
       NS_ERROR("CSS parser parsed a pseudo-class that we do not handle");
       result = PR_FALSE;  // unknown pseudo class
@@ -3658,7 +3670,11 @@ PRBool IsStateSelector(nsCSSSelector& aSelector)
         (pseudoClass->mAtom == nsCSSPseudoClasses::enabled) ||
         (pseudoClass->mAtom == nsCSSPseudoClasses::disabled) ||
         (pseudoClass->mAtom == nsCSSPseudoClasses::required) ||
-        (pseudoClass->mAtom == nsCSSPseudoClasses::optional)) {
+        (pseudoClass->mAtom == nsCSSPseudoClasses::optional) ||
+        (pseudoClass->mAtom == nsCSSPseudoClasses::valid) ||
+        (pseudoClass->mAtom == nsCSSPseudoClasses::invalid) ||
+        (pseudoClass->mAtom == nsCSSPseudoClasses::inRange) ||
+        (pseudoClass->mAtom == nsCSSPseudoClasses::outOfRange)) {
       return PR_TRUE;
     }
   }