diff --git a/layout/generic/nsPageFrame.cpp b/layout/generic/nsPageFrame.cpp
index 2b4d311751ba..8c27cbfe7dc5 100644
--- a/layout/generic/nsPageFrame.cpp
+++ b/layout/generic/nsPageFrame.cpp
@@ -57,9 +57,8 @@ NS_METHOD nsPageFrame::Reflow(nsIPresContext&          aPresContext,
     // Dispatch the reflow command to our content child. Allow it to be as high
     // as it wants
     nsSize            maxSize(aReflowState.availableWidth, NS_UNCONSTRAINEDSIZE);
-    nsHTMLReflowState kidReflowState(aPresContext, mFrames.FirstChild(),
-                                     aReflowState,
-                                     maxSize);
+    nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
+                                     mFrames.FirstChild(), maxSize);
   
     kidReflowState.isTopOfPage = PR_TRUE;
     ReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
@@ -100,7 +99,7 @@ NS_METHOD nsPageFrame::Reflow(nsIPresContext&          aPresContext,
     if (mFrames.NotEmpty()) {
       nsIFrame* frame = mFrames.FirstChild();
       nsSize  maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
-      nsHTMLReflowState kidReflowState(aPresContext, frame, aReflowState,
+      nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame,
                                        maxSize);
       kidReflowState.isTopOfPage = PR_TRUE;
 
@@ -153,6 +152,13 @@ nsPageFrame::GetFrameName(nsString& aResult) const
   return MakeFrameName("Page", aResult);
 }
 
+NS_IMETHODIMP
+nsPageFrame::IsPercentageBase(PRBool& aBase) const
+{
+  aBase = PR_TRUE;
+  return NS_OK;
+}
+
 //----------------------------------------------------------------------
 
 nsresult
diff --git a/layout/generic/nsPageFrame.h b/layout/generic/nsPageFrame.h
index 9f38b7e266f5..ae074173777b 100644
--- a/layout/generic/nsPageFrame.h
+++ b/layout/generic/nsPageFrame.h
@@ -29,6 +29,7 @@ public:
                      nsHTMLReflowMetrics& aDesiredSize,
                      const nsHTMLReflowState& aMaxSize,
                      nsReflowStatus&      aStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const;
 
   /**
    * Get the "type" of the frame
diff --git a/layout/html/base/src/nsPageFrame.cpp b/layout/html/base/src/nsPageFrame.cpp
index 2b4d311751ba..8c27cbfe7dc5 100644
--- a/layout/html/base/src/nsPageFrame.cpp
+++ b/layout/html/base/src/nsPageFrame.cpp
@@ -57,9 +57,8 @@ NS_METHOD nsPageFrame::Reflow(nsIPresContext&          aPresContext,
     // Dispatch the reflow command to our content child. Allow it to be as high
     // as it wants
     nsSize            maxSize(aReflowState.availableWidth, NS_UNCONSTRAINEDSIZE);
-    nsHTMLReflowState kidReflowState(aPresContext, mFrames.FirstChild(),
-                                     aReflowState,
-                                     maxSize);
+    nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
+                                     mFrames.FirstChild(), maxSize);
   
     kidReflowState.isTopOfPage = PR_TRUE;
     ReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
@@ -100,7 +99,7 @@ NS_METHOD nsPageFrame::Reflow(nsIPresContext&          aPresContext,
     if (mFrames.NotEmpty()) {
       nsIFrame* frame = mFrames.FirstChild();
       nsSize  maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
-      nsHTMLReflowState kidReflowState(aPresContext, frame, aReflowState,
+      nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame,
                                        maxSize);
       kidReflowState.isTopOfPage = PR_TRUE;
 
@@ -153,6 +152,13 @@ nsPageFrame::GetFrameName(nsString& aResult) const
   return MakeFrameName("Page", aResult);
 }
 
+NS_IMETHODIMP
+nsPageFrame::IsPercentageBase(PRBool& aBase) const
+{
+  aBase = PR_TRUE;
+  return NS_OK;
+}
+
 //----------------------------------------------------------------------
 
 nsresult
diff --git a/layout/html/base/src/nsPageFrame.h b/layout/html/base/src/nsPageFrame.h
index 9f38b7e266f5..ae074173777b 100644
--- a/layout/html/base/src/nsPageFrame.h
+++ b/layout/html/base/src/nsPageFrame.h
@@ -29,6 +29,7 @@ public:
                      nsHTMLReflowMetrics& aDesiredSize,
                      const nsHTMLReflowState& aMaxSize,
                      nsReflowStatus&      aStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const;
 
   /**
    * Get the "type" of the frame