Remove EnableThreadedCompositing from the browser.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 887c194a69b1268e0eb6af3992789841f4032719..0d97c9c7ecb707af17d6d150170e854e45ff8aa0 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1009,9 +1009,6 @@ static void AppendCompositorCommandLineFlags(CommandLine* command_line) {
   if (IsPinchVirtualViewportEnabled())
     command_line->AppendSwitch(cc::switches::kEnablePinchVirtualViewport);
 
-  if (IsThreadedCompositingEnabled())
-    command_line->AppendSwitch(switches::kEnableThreadedCompositing);
-
   if (IsDelegatedRendererEnabled())
     command_line->AppendSwitch(switches::kEnableDelegatedRenderer);
 
@@ -1114,6 +1111,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kDisableSeccompFilterSandbox,
     switches::kDisableSessionStorage,
     switches::kDisableSharedWorkers,
+    switches::kDisableThreadedCompositing,

[piman, 2014/06/13 20:55:19]

Is there a way to explicitly give this flag to the renderer in the layout tests
infra, instead of allowing this to be passed from the browser command line?

[danakj, 2014/06/13 20:57:28]

Uhmmm, idk! Hmm maybe something like EnableRendererLayoutTestMode() does.

[danakj, 2014/06/13 21:46:35]

Hm, I could wire it differently in the renderer/check for this flag in shell
instead of render thread, but I think we still need to pass the flag, or at
least, I don't know any special browser->renderer process data passing mechanism
specially for content shell..

     switches::kDisableTouchAdjustment,
     switches::kDisableTouchDragDrop,
     switches::kDisableTouchEditing,
@@ -1157,12 +1155,11 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kEnableStatsTable,
     switches::kEnableStrictSiteIsolation,
     switches::kEnableTargetedStyleRecalc,
-    switches::kEnableUniversalAcceleratedOverflowScroll,
     switches::kEnableTouchDragDrop,
     switches::kEnableTouchEditing,
+    switches::kEnableUniversalAcceleratedOverflowScroll,
     switches::kEnableViewport,
     switches::kEnableViewportMeta,
-    switches::kMainFrameResizesAreOrientationChanges,
     switches::kEnableVtune,
     switches::kEnableWebAnimationsSVG,
     switches::kEnableWebGLDraftExtensions,
@@ -1174,6 +1171,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kIgnoreResolutionLimitsForAcceleratedVideoDecode,
     switches::kJavaScriptFlags,
     switches::kLoggingLevel,
+    switches::kMainFrameResizesAreOrientationChanges,
     switches::kMaxUntiledLayerWidth,
     switches::kMaxUntiledLayerHeight,
     switches::kMemoryMetrics,