cc: Remove the opaque rect return-parameter from ContentLayerClient.

cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc

 // Copyright 2013 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 "cc/layers/append_quads_data.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/test/layer_tree_pixel_test.h"
@@ skipping 51 matching lines @@
   explicit BlueYellowLayerClient(gfx::Rect layer_rect)
       : layer_rect_(layer_rect) {}
 
   virtual void DidChangeLayerCanUseLCDText() OVERRIDE { }
 
   virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
 
   virtual void PaintContents(
       SkCanvas* canvas,
       const gfx::Rect& clip,
-      gfx::RectF* opaque,
       ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {
-    *opaque = gfx::RectF(layer_rect_.width(), layer_rect_.height());
-
     SkPaint paint;
     paint.setColor(SK_ColorBLUE);
     canvas->drawRect(SkRect::MakeWH(layer_rect_.width(),
                                     layer_rect_.height() / 2),
                      paint);
 
     paint.setColor(SK_ColorYELLOW);
     canvas->drawRect(
         SkRect::MakeXYWH(0,
                          layer_rect_.height() / 2,
@@ skipping 36 matching lines @@
 
 TEST_F(LayerTreeHostOnDemandRasterPixelTestWithGpuRasterizationForced,
        RasterPictureLayer) {
   RunOnDemandRasterPixelTest();
 }
 
 }  // namespace
 }  // namespace cc
 
 #endif  // OS_ANDROID