Enable disabling WebCore::GraphicsContext in telemetry.

cc/test/fake_content_layer_client.h

 // Copyright 2012 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.
 
 #ifndef CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_
 #define CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_
 
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "cc/layers/content_layer_client.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class FakeContentLayerClient : public ContentLayerClient {
  public:
   struct BitmapData {
     SkBitmap bitmap;
     gfx::Point point;
     SkPaint paint;
   };
 
   FakeContentLayerClient();
   virtual ~FakeContentLayerClient();
 
-  virtual void PaintContents(SkCanvas* canvas,
-                             const gfx::Rect& rect,
-                             gfx::RectF* opaque_rect) OVERRIDE;
+  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));
   }
 
   void add_draw_bitmap(const SkBitmap& bitmap,
                        const gfx::Point& point,
                        const SkPaint& paint) {
     BitmapData data;
     data.bitmap = bitmap;
     data.point = point;
     data.paint = paint;
     draw_bitmaps_.push_back(data);
   }
 
   SkCanvas* last_canvas() const { return last_canvas_; }
 
+  ContentLayerClient::GraphicsContextStatus last_context_status() const {
+    return last_context_status_;
+  }
+
  private:
   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_;
+  ContentLayerClient::GraphicsContextStatus last_context_status_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_