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

cc/test/fake_content_layer_client.h

Index: cc/test/fake_content_layer_client.h
diff --git a/cc/test/fake_content_layer_client.h b/cc/test/fake_content_layer_client.h
index cc8ddb6f8445862a74dc046e2eaac818e9e839fa..c206c89380d2050ea9726489fff4bd7c68339b9b 100644
--- a/cc/test/fake_content_layer_client.h
+++ b/cc/test/fake_content_layer_client.h
@@ -30,13 +30,10 @@ class FakeContentLayerClient : public ContentLayerClient {
   virtual void PaintContents(
       SkCanvas* canvas,
       const gfx::Rect& rect,
-      gfx::RectF* opaque_rect,
       ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE;
   virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
   virtual bool FillsBoundsCompletely() const OVERRIDE;
 
-  void set_paint_all_opaque(bool opaque) { paint_all_opaque_ = opaque; }
-
   void add_draw_rect(const gfx::RectF& rect, const SkPaint& paint) {
     draw_rects_.push_back(std::make_pair(rect, paint));
   }
@@ -61,7 +58,6 @@ class FakeContentLayerClient : public ContentLayerClient {
   typedef std::vector<std::pair<gfx::RectF, SkPaint> > RectPaintVector;
   typedef std::vector<BitmapData> BitmapVector;
 
-  bool paint_all_opaque_;
   RectPaintVector draw_rects_;
   BitmapVector draw_bitmaps_;
   SkCanvas* last_canvas_;