Enable disabling WebCore::GraphicsContext in telemetry.

cc/layers/content_layer.cc

 // Copyright 2010 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/content_layer.h"
 
 #include "base/auto_reset.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "cc/layers/content_layer_client.h"
@@ skipping 10 matching lines @@
 
 scoped_ptr<ContentLayerPainter> ContentLayerPainter::Create(
     ContentLayerClient* client) {
   return make_scoped_ptr(new ContentLayerPainter(client));
 }
 
 void ContentLayerPainter::Paint(SkCanvas* canvas,
                                 const gfx::Rect& content_rect,
                                 gfx::RectF* opaque) {
   base::TimeTicks paint_start = base::TimeTicks::HighResNow();
-  client_->PaintContents(canvas, content_rect, opaque);
+  client_->PaintContents(canvas,
+                         content_rect,
+                         opaque,
+                         ContentLayerClient::GRAPHICS_CONTEXT_ENABLED);
   base::TimeTicks paint_end = base::TimeTicks::HighResNow();
   // The start and end times might be the same if the paint was very fast or if
   // our timer granularity is poor. Treat this as a very short time duration
   // instead of none to avoid dividing by zero.
   if (paint_end == paint_start)
     paint_end += base::TimeDelta::FromMicroseconds(1);
 
   double pixels_per_sec = (content_rect.width() * content_rect.height()) /
                           (paint_end - paint_start).InSecondsF();
   UMA_HISTOGRAM_CUSTOM_COUNTS("Renderer4.AccelContentPaintDurationMS",
@@ skipping 114 matching lines @@
 skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
   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 ContentLayer::OnOutputSurfaceCreated() {
   SetTextureFormat(
       layer_tree_host()->GetRendererCapabilities().best_texture_format);
   TiledLayer::OnOutputSurfaceCreated();
 }
 
 }  // namespace cc