Fixing warnings. r=travis

layout/xul/base/src/nsMenuPopupFrame.cpp

@@ -300,7 +300,6 @@ nsMenuPopupFrame::GetNextMenuItem(nsIMenuFrame* aStart, nsIMenuFrame** aResult)
   }
   else currFrame = mFrames.FirstChild();
   
-  nsIFrame* start = currFrame;
   while (currFrame) {
     nsCOMPtr<nsIContent> current;
     currFrame->GetContent(getter_AddRefs(current));

layout/xul/base/src/nsPopupSetFrame.cpp

@@ -159,6 +159,8 @@ nsPopupSetFrame::SetInitialChildList(nsIPresContext& aPresContext,
         frames.RemoveFrame(frame);
         mPopupFrames.AppendFrame(this, frame);
         nsIFrame* first = frames.FirstChild();
+        rv = nsBoxFrame::SetInitialChildList(aPresContext, aListName, first);
+        return rv;
       }
       frame->GetNextSibling(&frame);
     }

layout/xul/base/src/nsSliderFrame.cpp

@@ -647,7 +647,6 @@ nsSliderFrame::SetCurrentPosition(nsIContent* scrollbar, nsIFrame* aThumbFrame,
 {
   
    // get our current position and max position from our content node
-  PRInt32 curpos = GetCurrentPosition(scrollbar);
   PRInt32 maxpos = GetMaxPosition(scrollbar);
 
   // get the new position and make sure it is in bounds

layout/xul/base/src/nsTreeCellFrame.cpp

@@ -35,27 +35,6 @@
 #include "nsCOMPtr.h"
 #include "nsINameSpaceManager.h"
 
-static void ForceDrawFrame(nsIFrame * aFrame)
-{
-  if (aFrame == nsnull) {
-    return;
-  }
-  nsRect    rect;
-  nsIView * view;
-  nsPoint   pnt;
-  aFrame->GetOffsetFromView(pnt, &view);
-  aFrame->GetRect(rect);
-  rect.x = pnt.x;
-  rect.y = pnt.y;
-  if (view) {
-    nsCOMPtr<nsIViewManager> viewMgr;
-    view->GetViewManager(*getter_AddRefs(viewMgr));
-    if (viewMgr)
-      viewMgr->UpdateView(view, rect, 0);
-  }
-
-}
-
 //
 // NS_NewTreeCellFrame
 //
@@ -125,7 +104,7 @@ nsTreeCellFrame::Init(nsIPresContext&  aPresContext,
 
 			// Get the table frame.
       nsTableFrame* tableFrame = nsnull;
-      nsresult rv = nsTableFrame::GetTableFrame(rowGroupFrame, tableFrame);
+      rv = nsTableFrame::GetTableFrame(rowGroupFrame, tableFrame);
       if (NS_FAILED(rv) || (nsnull == tableFrame)) {
         return rv;
       }
@@ -362,7 +341,7 @@ nsTreeCellFrame::ToggleOpenClose()
 	  
 	  // Take the tree item content and toggle the value of its open attribute.
 	  nsAutoString attrValue;
-    nsresult result = treeItem->GetAttribute("open", attrValue);
+    treeItem->GetAttribute("open", attrValue);
     attrValue.ToLowerCase();
     PRBool isExpanded = (attrValue=="true");
     if (isExpanded)
@@ -397,7 +376,7 @@ nsTreeCellFrame::Open()
 	  
 	  // Take the tree item content and toggle the value of its open attribute.
 	  nsAutoString attrValue;
-    nsresult result = treeItem->GetAttribute("open", attrValue);
+    treeItem->GetAttribute("open", attrValue);
     attrValue.ToLowerCase();
     PRBool isExpanded = (attrValue=="true");
     if (!isExpanded) {
@@ -426,7 +405,7 @@ nsTreeCellFrame::Close()
 	  
 	  // Take the tree item content and toggle the value of its open attribute.
 	  nsAutoString attrValue;
-    nsresult result = treeItem->GetAttribute("open", attrValue);
+    treeItem->GetAttribute("open", attrValue);
     attrValue.ToLowerCase();
     PRBool isExpanded = (attrValue=="true");
     if (isExpanded) {

layout/xul/base/src/nsTreeIndentationFrame.cpp

@@ -33,8 +33,8 @@
 
 nsTreeIndentationFrame::nsTreeIndentationFrame()
 {
-	width = 0;
-	haveComputedWidth = PR_FALSE;
+	mWidth = 0;
+	mHaveComputedWidth = PR_FALSE;
 }
 
 nsresult
@@ -70,11 +70,10 @@ nsTreeIndentationFrame::Reflow(nsIPresContext&          aPresContext,
   aMetrics.ascent = 0;
   aMetrics.descent = 0;
 
-  nscoord width = 0;
-  
   // Compute our width based on the depth of our node within the content model
-  if (!haveComputedWidth)
+  if (!mHaveComputedWidth)
   {
+    mWidth = 0;
 	  nscoord level = 0;
 	  
 	  // First climb out to the tree item level.
@@ -109,15 +108,15 @@ nsTreeIndentationFrame::Reflow(nsIPresContext&          aPresContext,
 		  level = (level/2) - 1;
       if (level < 0) level = 0;
 
-		  width = level*16; // Hardcode an indentation of 16 pixels for now. TODO: Make this a parameter or something
+		  mWidth = level*16; // Hardcode an indentation of 16 pixels for now. TODO: Make this a parameter or something
 	  }
   }
 
   float p2t;
   aPresContext.GetScaledPixelsToTwips(&p2t);
  
-  if (0 != width) {
-      aMetrics.width = NSIntPixelsToTwips(width, p2t);
+  if (0 != mWidth) {
+      aMetrics.width = NSIntPixelsToTwips(mWidth, p2t);
   }
   
   if (nsnull != aMetrics.maxElementSize) {

layout/xul/base/src/nsTreeIndentationFrame.h

@@ -32,6 +32,6 @@ public:
 protected:
   virtual ~nsTreeIndentationFrame();
 
-  nscoord width;
-  PRBool haveComputedWidth;
+  nscoord mWidth;
+  PRBool mHaveComputedWidth;
 };

layout/xul/base/src/nsTreeRowFrame.cpp

@@ -342,7 +342,6 @@ nsTreeRowFrame::HandleHeaderDragEvent(nsIPresContext& aPresContext,
   for (colX = flexIndex+1; colX < columnCount; colX++) {
     // Retrieve the current widths for these columns and compute
     // the total amount of space they occupy.
-    nsTableColFrame* colFrame = tableFrame->GetColFrame(colX);
     propTotal += colWidths[colX];
   }
 
@@ -392,7 +391,7 @@ nsTreeRowFrame::HandleHeaderDragEvent(nsIPresContext& aPresContext,
     treeFrame->SetUseGeneration(PR_FALSE); // Cached rows have to reflow.
     treeFrame->UnsuppressReflow();
 
-    PRInt32 colWidth = flexWidth - delta;
+    colWidth = flexWidth - delta;
     sprintf(ch,"%d*", colWidth);
     nsAutoString propColWidth(ch);
     flexContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::width, propColWidth,