diff --git a/content/shared/public/nsLayoutAtoms.h b/content/shared/public/nsLayoutAtoms.h
index e3560a3995a0..d949fce3f2f9 100644
--- a/content/shared/public/nsLayoutAtoms.h
+++ b/content/shared/public/nsLayoutAtoms.h
@@ -67,6 +67,8 @@ public:
   // Alphabetical list of frame types
   static nsIAtom* areaFrame;
   static nsIAtom* blockFrame;
+  static nsIAtom* htmlFrameOuterFrame;
+  static nsIAtom* htmlFrameInnerFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* letterFrame;
   static nsIAtom* lineFrame;
diff --git a/content/shared/src/nsLayoutAtoms.cpp b/content/shared/src/nsLayoutAtoms.cpp
index 84abb46de22b..27bf14d20c13 100644
--- a/content/shared/src/nsLayoutAtoms.cpp
+++ b/content/shared/src/nsLayoutAtoms.cpp
@@ -53,6 +53,8 @@ nsIAtom* nsLayoutAtoms::pagePseudo;
 // frame types
 nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameInnerFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameOuterFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::letterFrame;
 nsIAtom* nsLayoutAtoms::lineFrame;
@@ -103,6 +105,8 @@ void nsLayoutAtoms::AddrefAtoms()
 
     areaFrame = NS_NewAtom("AreaFrame");
     blockFrame = NS_NewAtom("BlockFrame");
+    htmlFrameInnerFrame = NS_NewAtom("htmlFrameInnerFrame");
+    htmlFrameOuterFrame = NS_NewAtom("htmlFrameOuterFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     letterFrame = NS_NewAtom("LetterFrame");
     lineFrame = NS_NewAtom("LineFrame");
@@ -155,6 +159,8 @@ void nsLayoutAtoms::ReleaseAtoms()
     
     NS_RELEASE(areaFrame);
     NS_RELEASE(blockFrame);
+    NS_RELEASE(htmlFrameInnerFrame);
+    NS_RELEASE(htmlFrameOuterFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(letterFrame);
     NS_RELEASE(lineFrame);
diff --git a/layout/base/nsLayoutAtoms.cpp b/layout/base/nsLayoutAtoms.cpp
index 84abb46de22b..27bf14d20c13 100644
--- a/layout/base/nsLayoutAtoms.cpp
+++ b/layout/base/nsLayoutAtoms.cpp
@@ -53,6 +53,8 @@ nsIAtom* nsLayoutAtoms::pagePseudo;
 // frame types
 nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameInnerFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameOuterFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::letterFrame;
 nsIAtom* nsLayoutAtoms::lineFrame;
@@ -103,6 +105,8 @@ void nsLayoutAtoms::AddrefAtoms()
 
     areaFrame = NS_NewAtom("AreaFrame");
     blockFrame = NS_NewAtom("BlockFrame");
+    htmlFrameInnerFrame = NS_NewAtom("htmlFrameInnerFrame");
+    htmlFrameOuterFrame = NS_NewAtom("htmlFrameOuterFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     letterFrame = NS_NewAtom("LetterFrame");
     lineFrame = NS_NewAtom("LineFrame");
@@ -155,6 +159,8 @@ void nsLayoutAtoms::ReleaseAtoms()
     
     NS_RELEASE(areaFrame);
     NS_RELEASE(blockFrame);
+    NS_RELEASE(htmlFrameInnerFrame);
+    NS_RELEASE(htmlFrameOuterFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(letterFrame);
     NS_RELEASE(lineFrame);
diff --git a/layout/base/nsLayoutAtoms.h b/layout/base/nsLayoutAtoms.h
index e3560a3995a0..d949fce3f2f9 100644
--- a/layout/base/nsLayoutAtoms.h
+++ b/layout/base/nsLayoutAtoms.h
@@ -67,6 +67,8 @@ public:
   // Alphabetical list of frame types
   static nsIAtom* areaFrame;
   static nsIAtom* blockFrame;
+  static nsIAtom* htmlFrameOuterFrame;
+  static nsIAtom* htmlFrameInnerFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* letterFrame;
   static nsIAtom* lineFrame;
diff --git a/layout/base/public/nsLayoutAtoms.h b/layout/base/public/nsLayoutAtoms.h
index e3560a3995a0..d949fce3f2f9 100644
--- a/layout/base/public/nsLayoutAtoms.h
+++ b/layout/base/public/nsLayoutAtoms.h
@@ -67,6 +67,8 @@ public:
   // Alphabetical list of frame types
   static nsIAtom* areaFrame;
   static nsIAtom* blockFrame;
+  static nsIAtom* htmlFrameOuterFrame;
+  static nsIAtom* htmlFrameInnerFrame;
   static nsIAtom* inlineFrame;
   static nsIAtom* letterFrame;
   static nsIAtom* lineFrame;
diff --git a/layout/base/src/nsLayoutAtoms.cpp b/layout/base/src/nsLayoutAtoms.cpp
index 84abb46de22b..27bf14d20c13 100644
--- a/layout/base/src/nsLayoutAtoms.cpp
+++ b/layout/base/src/nsLayoutAtoms.cpp
@@ -53,6 +53,8 @@ nsIAtom* nsLayoutAtoms::pagePseudo;
 // frame types
 nsIAtom* nsLayoutAtoms::areaFrame;
 nsIAtom* nsLayoutAtoms::blockFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameInnerFrame;
+nsIAtom* nsLayoutAtoms::htmlFrameOuterFrame;
 nsIAtom* nsLayoutAtoms::inlineFrame;
 nsIAtom* nsLayoutAtoms::letterFrame;
 nsIAtom* nsLayoutAtoms::lineFrame;
@@ -103,6 +105,8 @@ void nsLayoutAtoms::AddrefAtoms()
 
     areaFrame = NS_NewAtom("AreaFrame");
     blockFrame = NS_NewAtom("BlockFrame");
+    htmlFrameInnerFrame = NS_NewAtom("htmlFrameInnerFrame");
+    htmlFrameOuterFrame = NS_NewAtom("htmlFrameOuterFrame");
     inlineFrame = NS_NewAtom("InlineFrame");
     letterFrame = NS_NewAtom("LetterFrame");
     lineFrame = NS_NewAtom("LineFrame");
@@ -155,6 +159,8 @@ void nsLayoutAtoms::ReleaseAtoms()
     
     NS_RELEASE(areaFrame);
     NS_RELEASE(blockFrame);
+    NS_RELEASE(htmlFrameInnerFrame);
+    NS_RELEASE(htmlFrameOuterFrame);
     NS_RELEASE(inlineFrame);
     NS_RELEASE(letterFrame);
     NS_RELEASE(lineFrame);