Enable disabling WebCore::GraphicsContext in telemetry.

cc/layers/picture_layer_unittest.cc

Index: cc/layers/picture_layer_unittest.cc
diff --git a/cc/layers/picture_layer_unittest.cc b/cc/layers/picture_layer_unittest.cc
index 02327a6df0ac9329b296ea4c6faf42956586c0a0..dfc24a04e99a3393a18a406f5e5ecd8bb95e0205 100644
--- a/cc/layers/picture_layer_unittest.cc
+++ b/cc/layers/picture_layer_unittest.cc
@@ -20,9 +20,11 @@ namespace {
 
 class MockContentLayerClient : public ContentLayerClient {
  public:
-  virtual void PaintContents(SkCanvas* canvas,
-                             const gfx::Rect& clip,
-                             gfx::RectF* opaque) OVERRIDE {}
+  virtual void PaintContents(
+      SkCanvas* canvas,
+      const gfx::Rect& clip,
+      gfx::RectF* opaque,
+      ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {}
   virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
   virtual bool FillsBoundsCompletely() const OVERRIDE {
     return false;