cc: Remove WebCore rect use from the compositor, except within Region.

cc/tiled_layer.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "cc/tiled_layer.h"
 
 #include "Region.h"
 #include "base/basictypes.h"
@@ skipping 133 matching lines @@
     gfx::Size oldBounds = m_tiler->bounds();
     gfx::Size newBounds = contentBounds();
     if (oldBounds == newBounds)
         return;
     m_tiler->setBounds(newBounds);
 
     // Invalidate any areas that the new bounds exposes.
     Region oldRegion = gfx::Rect(gfx::Point(), oldBounds);
     Region newRegion = gfx::Rect(gfx::Point(), newBounds);
     newRegion.Subtract(oldRegion);
-    Vector<WebCore::IntRect> rects = newRegion.rects();
-    for (size_t i = 0; i < rects.size(); ++i)
-        invalidateContentRect(cc::IntRect(rects[i]));
+    for (Region::Iterator newRects(newRegion); newRects.has_rect(); newRects.next())
+        invalidateContentRect(newRects.rect());
 }
 
 void TiledLayer::setTileSize(const gfx::Size& size)
 {
     m_tiler->setTileSize(size);
 }
 
 void TiledLayer::setBorderTexelOption(LayerTilingData::BorderTexelOption borderTexelOption)
 {
     m_tiler->setBorderTexelOption(borderTexelOption);
@@ skipping 611 matching lines @@
     gfx::Rect prepaintRect = visibleContentRect();
     prepaintRect.Inset(-m_tiler->tileSize().width() * prepaintColumns,
                        -m_tiler->tileSize().height() * prepaintRows);
     gfx::Rect contentRect(gfx::Point(), contentBounds());
     prepaintRect.Intersect(contentRect);
 
     return prepaintRect;
 }
 
 }