changing nsCOMPtr to weak references for PresContext

a=leaf, r=self, bug=bloat&leak went up

layout/forms/nsFormControlFrame.cpp

@@ -76,6 +76,7 @@ nsFormControlFrame::nsFormControlFrame()
   mFormFrame      = nsnull;
   mSuggestedWidth = NS_FORMSIZE_NOTSET;
   mSuggestedHeight = NS_FORMSIZE_NOTSET;
+  mPresContext    = nsnull;
 
   // Reflow Optimization
   mCacheSize.width             = -1;

layout/forms/nsFormControlFrame.h

@@ -304,7 +304,7 @@ protected:
   nscoord      mSuggestedWidth;
   nscoord      mSuggestedHeight;
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 
   // Reflow Optimization
   nsSize       mCacheSize;

layout/forms/nsHTMLButtonControlFrame.cpp

@@ -83,6 +83,7 @@ nsHTMLButtonControlFrame::nsHTMLButtonControlFrame()
   mTranslatedRect = nsRect(0,0,0,0);
   mDidInit = PR_FALSE;
   mRenderer.SetNameSpace(kNameSpaceID_None);
+  mPresContext    = nsnull;
 
   mCacheSize.width             = -1;
   mCacheSize.height            = -1;

layout/forms/nsHTMLButtonControlFrame.h

@@ -156,7 +156,7 @@ protected:
   PRBool mDidInit;
   nsButtonFrameRenderer mRenderer;
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 
   //Resize Reflow OpitmizationSize;
   nsSize                mCacheSize;

layout/forms/nsLegendFrame.cpp

@@ -61,6 +61,7 @@ NS_NewLegendFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
 nsLegendFrame::nsLegendFrame()
   : nsAreaFrame()
 {
+  mPresContext    = nsnull;
 }
 
 nsLegendFrame::~nsLegendFrame()

layout/forms/nsLegendFrame.h

@@ -57,7 +57,7 @@ public:
 
   PRInt32 GetAlign();
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 };
 
 

layout/html/forms/src/nsFormControlFrame.cpp

@@ -76,6 +76,7 @@ nsFormControlFrame::nsFormControlFrame()
   mFormFrame      = nsnull;
   mSuggestedWidth = NS_FORMSIZE_NOTSET;
   mSuggestedHeight = NS_FORMSIZE_NOTSET;
+  mPresContext    = nsnull;
 
   // Reflow Optimization
   mCacheSize.width             = -1;

layout/html/forms/src/nsFormControlFrame.h

@@ -304,7 +304,7 @@ protected:
   nscoord      mSuggestedWidth;
   nscoord      mSuggestedHeight;
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 
   // Reflow Optimization
   nsSize       mCacheSize;

layout/html/forms/src/nsHTMLButtonControlFrame.cpp

@@ -83,6 +83,7 @@ nsHTMLButtonControlFrame::nsHTMLButtonControlFrame()
   mTranslatedRect = nsRect(0,0,0,0);
   mDidInit = PR_FALSE;
   mRenderer.SetNameSpace(kNameSpaceID_None);
+  mPresContext    = nsnull;
 
   mCacheSize.width             = -1;
   mCacheSize.height            = -1;

layout/html/forms/src/nsHTMLButtonControlFrame.h

@@ -156,7 +156,7 @@ protected:
   PRBool mDidInit;
   nsButtonFrameRenderer mRenderer;
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 
   //Resize Reflow OpitmizationSize;
   nsSize                mCacheSize;

layout/html/forms/src/nsLegendFrame.cpp

@@ -61,6 +61,7 @@ NS_NewLegendFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
 nsLegendFrame::nsLegendFrame()
   : nsAreaFrame()
 {
+  mPresContext    = nsnull;
 }
 
 nsLegendFrame::~nsLegendFrame()

layout/html/forms/src/nsLegendFrame.h

@@ -57,7 +57,7 @@ public:
 
   PRInt32 GetAlign();
 
-  nsCOMPtr<nsIPresContext> mPresContext;
+  nsIPresContext * mPresContext;
 };