Added some temporary code to ensure that the floated frame is deleted

layout/generic/nsPlaceholderFrame.cpp

@@ -55,6 +55,17 @@ nsPlaceholderFrame::~nsPlaceholderFrame()
 {
 }
 
+NS_IMETHODIMP
+nsPlaceholderFrame::DeleteFrame(nsIPresContext& aPresContext)
+{
+  // XXX Delete the floated frame
+  if (nsnull != mAnchoredItem) {
+    mAnchoredItem->DeleteFrame(aPresContext);
+  }
+
+  return nsFrame::DeleteFrame(aPresContext);
+}
+
 NS_IMETHODIMP
 nsPlaceholderFrame::Reflow(nsIPresContext&          aPresContext,
                            nsHTMLReflowMetrics&     aDesiredSize,

layout/generic/nsPlaceholderFrame.h

@@ -47,6 +47,8 @@ public:
                     nsReflowStatus& aStatus);
 
   // nsIFrame overrides
+  NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
+
   NS_IMETHOD Paint(nsIPresContext& aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect& aDirtyRect);

layout/html/base/src/nsPlaceholderFrame.cpp

@@ -55,6 +55,17 @@ nsPlaceholderFrame::~nsPlaceholderFrame()
 {
 }
 
+NS_IMETHODIMP
+nsPlaceholderFrame::DeleteFrame(nsIPresContext& aPresContext)
+{
+  // XXX Delete the floated frame
+  if (nsnull != mAnchoredItem) {
+    mAnchoredItem->DeleteFrame(aPresContext);
+  }
+
+  return nsFrame::DeleteFrame(aPresContext);
+}
+
 NS_IMETHODIMP
 nsPlaceholderFrame::Reflow(nsIPresContext&          aPresContext,
                            nsHTMLReflowMetrics&     aDesiredSize,

layout/html/base/src/nsPlaceholderFrame.h

@@ -47,6 +47,8 @@ public:
                     nsReflowStatus& aStatus);
 
   // nsIFrame overrides
+  NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
+
   NS_IMETHOD Paint(nsIPresContext& aPresContext,
                    nsIRenderingContext& aRenderingContext,
                    const nsRect& aDirtyRect);