Enable disabling WebCore::GraphicsContext in telemetry.

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 1a5221f0245139301431a6b94335fcb7bf2040f8..596e4ec263ccf263fd6603b50846734d9448817d 100644
--- a/cc/test/fake_content_layer_client.h
+++ b/cc/test/fake_content_layer_client.h
@@ -29,7 +29,9 @@ class FakeContentLayerClient : public ContentLayerClient {
 
   virtual void PaintContents(SkCanvas* canvas,
                              const gfx::Rect& rect,
-                             gfx::RectF* opaque_rect) OVERRIDE;
+                             gfx::RectF* opaque_rect,
+                             ContentLayerClient::GraphicsContextStatus
+                                 graphics_context_status) OVERRIDE;
   virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
   virtual bool FillsBoundsCompletely() const OVERRIDE;
 
@@ -51,6 +53,10 @@ class FakeContentLayerClient : public ContentLayerClient {
 
   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;
@@ -59,6 +65,7 @@ class FakeContentLayerClient : public ContentLayerClient {
   RectPaintVector draw_rects_;
   BitmapVector draw_bitmaps_;
   SkCanvas* last_canvas_;
+  ContentLayerClient::GraphicsContextStatus last_context_status_;
 };
 
 }  // namespace cc