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

cc/render_pass.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/render_pass.h"
 
 #include "cc/layer_impl.h"
 #include "cc/math_util.h"
@@ skipping 80 matching lines @@
 
     // Manually create the quad state for the gutter quads, as the root layer
     // doesn't have any bounds and so can't generate this itself.
     // FIXME: Make the gutter quads generated by the solid color layer (make it smarter about generating quads to fill unoccluded areas).
     gfx::Rect rootTargetRect = rootLayer->renderSurface()->contentRect();
     float opacity = 1;
     bool opaque = true;
     SharedQuadState* sharedQuadState = quadCuller.useSharedQuadState(SharedQuadState::create(rootLayer->drawTransform(), rootTargetRect, rootTargetRect, opacity, opaque));
     DCHECK(rootLayer->screenSpaceTransform().isInvertible());
     WebTransformationMatrix transformToLayerSpace = rootLayer->screenSpaceTransform().inverse();
-    Vector<WebCore::IntRect> fillRects = fillRegion.rects();
-    for (size_t i = 0; i < fillRects.size(); ++i) {
+    for (Region::Iterator fillRects(fillRegion); fillRects.has_rect(); fillRects.next()) {
         // The root layer transform is composed of translations and scales only, no perspective, so mapping is sufficient.
-        gfx::Rect layerRect = MathUtil::mapClippedRect(transformToLayerSpace, cc::IntRect(fillRects[i]));
+        gfx::Rect layerRect = MathUtil::mapClippedRect(transformToLayerSpace, fillRects.rect());
         // Skip the quad culler and just append the quads directly to avoid occlusion checks.
         m_quadList.append(SolidColorDrawQuad::create(sharedQuadState, layerRect, screenBackgroundColor).PassAs<DrawQuad>());
     }
 }
 
 void RenderPass::setFilter(SkImageFilter* filter) {
     SkRefCnt_SafeAssign(m_filter, filter);
 }
 
 }  // namespace cc