Added preliminary support for tile rasterization with Ganesh

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 917aba7c55ca827d8b35becbfeb5275e4422366b..307656ef7dc929bc924e4752706ada0d2b3081ab 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -150,6 +150,7 @@ scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
                                            max_untiled_layer_height);
 
   settings.impl_side_painting = cc::switches::IsImplSidePaintingEnabled();
+  settings.using_gpu_rasterization = cc::switches::IsGPURasterizationEnabled();
 
   settings.calculate_top_controls_position =
       cmd->HasSwitch(cc::switches::kEnableTopControlsPositionCalculation);