Enable disabling WebCore::GraphicsContext in telemetry.

cc/layers/picture_layer.cc

 // 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.
 
 #include "cc/layers/picture_layer.h"
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
@@ skipping 155 matching lines @@
   // picture. For now we just paint a fresh one to get consistent results.
   if (!DrawsContent())
     return skia::RefPtr<SkPicture>();
 
   int width = bounds().width();
   int height = bounds().height();
   gfx::RectF opaque;
 
   SkPictureRecorder recorder;
   SkCanvas* canvas = recorder.beginRecording(width, height, NULL, 0);
-  client_->PaintContents(canvas, gfx::Rect(width, height), &opaque);
+  client_->PaintContents(canvas,
+                         gfx::Rect(width, height),
+                         &opaque,
+                         ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
   skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
   return picture;
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc