Disable GPU features AcceleratingCompositing and WebGL by default.

chrome/browser/tab_contents/render_view_host_delegate_helper.cc

Index: chrome/browser/tab_contents/render_view_host_delegate_helper.cc
diff --git a/chrome/browser/tab_contents/render_view_host_delegate_helper.cc b/chrome/browser/tab_contents/render_view_host_delegate_helper.cc
index b94ab7dce5e05e32e6cd159f1c8d561b07f3046e..69ae61862d09acce2588b22390a10f2929a9893b 100644
--- a/chrome/browser/tab_contents/render_view_host_delegate_helper.cc
+++ b/chrome/browser/tab_contents/render_view_host_delegate_helper.cc
@@ -280,7 +280,7 @@ WebPreferences RenderViewHostDelegateHelper::GetWebkitPrefs(
     web_prefs.databases_enabled =
         !command_line.HasSwitch(switches::kDisableDatabases);
     web_prefs.experimental_webgl_enabled =
-        !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
+        command_line.HasSwitch(switches::kEnableExperimentalWebGL);
     web_prefs.site_specific_quirks_enabled =
         !command_line.HasSwitch(switches::kDisableSiteSpecificQuirks);
     web_prefs.allow_file_access_from_file_urls =
@@ -288,7 +288,7 @@ WebPreferences RenderViewHostDelegateHelper::GetWebkitPrefs(
     web_prefs.show_composited_layer_borders =
         command_line.HasSwitch(switches::kShowCompositedLayerBorders);
     web_prefs.accelerated_compositing_enabled =
-        !command_line.HasSwitch(switches::kDisableAcceleratedCompositing);
+        command_line.HasSwitch(switches::kEnableAcceleratedCompositing);
     web_prefs.accelerated_2d_canvas_enabled =
         command_line.HasSwitch(switches::kEnableAccelerated2dCanvas);
     web_prefs.memory_info_enabled =