Enable disabling WebCore::GraphicsContext in telemetry.

webkit/renderer/compositor_bindings/web_content_layer_impl.cc

Index: webkit/renderer/compositor_bindings/web_content_layer_impl.cc
diff --git a/webkit/renderer/compositor_bindings/web_content_layer_impl.cc b/webkit/renderer/compositor_bindings/web_content_layer_impl.cc
index 95a4b7f9b13bb3ed178261c13c6b578e2f04cf17..df0d5a03f66d1b9484fed5e0195328f1cef93712 100644
--- a/webkit/renderer/compositor_bindings/web_content_layer_impl.cc
+++ b/webkit/renderer/compositor_bindings/web_content_layer_impl.cc
@@ -55,7 +55,8 @@ void WebContentLayerImpl::setHasGpuRasterizationHint(bool has_hint) {
 
 void WebContentLayerImpl::PaintContents(SkCanvas* canvas,
                                         const gfx::Rect& clip,
-                                        gfx::RectF* opaque) {
+                                        gfx::RectF* opaque,
+                                        bool disableContext) {
   if (!client_)
     return;
 
@@ -63,7 +64,8 @@ void WebContentLayerImpl::PaintContents(SkCanvas* canvas,
   // For picture layers, always record with LCD text.  PictureLayerImpl
   // will turn this off later during rasterization.
   bool use_lcd_text = WebLayerImpl::UsingPictureLayer() || can_use_lcd_text_;
-  client_->paintContents(canvas, clip, use_lcd_text, web_opaque);
+  client_->paintContents(
+      canvas, clip, use_lcd_text, web_opaque, disableContext);
   *opaque = web_opaque;
 }