Added support for percentage base margins to the root, root-content and block frames

layout/generic/nsBlockFrame.cpp

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/generic/nsBlockReflowState.cpp

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/generic/nsBlockReflowState.h

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/generic/nsHTMLFrame.cpp

@@ -49,6 +49,10 @@ public:
   NS_IMETHOD HandleEvent(nsIPresContext& aPresContext, 
                          nsGUIEvent*     aEvent,
                          nsEventStatus&  aEventStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
 };
 
 // Pseudo frame created by the root frame
@@ -66,6 +70,10 @@ public:
   NS_IMETHOD HandleEvent(nsIPresContext& aPresContext, 
                          nsGUIEvent*     aEvent,
                          nsEventStatus&  aEventStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
 
   void ComputeChildMargins(nsMargin& aMargin);
 };

layout/html/base/src/nsBlockFrame.cpp

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/html/base/src/nsBlockReflowState.cpp

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/html/base/src/nsBlockReflowState.h

@@ -242,7 +242,10 @@ public:
   NS_IMETHOD Paint(nsIPresContext&      aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect&        aDirtyRect);
-
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
   NS_IMETHOD List(FILE* out, PRInt32 aIndent, nsIListFilter *aFilter) const;
   NS_IMETHOD ListTag(FILE* out) const;
   NS_IMETHOD VerifyTree() const;

layout/html/base/src/nsHTMLFrame.cpp

@@ -49,6 +49,10 @@ public:
   NS_IMETHOD HandleEvent(nsIPresContext& aPresContext, 
                          nsGUIEvent*     aEvent,
                          nsEventStatus&  aEventStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
 };
 
 // Pseudo frame created by the root frame
@@ -66,6 +70,10 @@ public:
   NS_IMETHOD HandleEvent(nsIPresContext& aPresContext, 
                          nsGUIEvent*     aEvent,
                          nsEventStatus&  aEventStatus);
+  NS_IMETHOD IsPercentageBase(PRBool& aBase) const {
+    aBase = PR_TRUE;
+    return NS_OK;
+  }
 
   void ComputeChildMargins(nsMargin& aMargin);
 };