Remove the kDisableBrowserPluginCompositing flag.

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index e40e9738c1729a3b3e916d262d25ecd123db07f3..f19b83dec49bb7222eb770c84b09c8a5284b7019 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -514,16 +514,6 @@ WebPreferences RenderViewHostImpl::GetWebkitPrefs(const GURL& url) {
       switches::kEnableSpatialNavigation);
 
   GetContentClient()->browser()->OverrideWebkitPrefs(this, url, &prefs);
-
-  // Disable compositing in guests until we have compositing path implemented
-  // for guests.
-  bool guest_compositing_enabled = !command_line.HasSwitch(
-      switches::kDisableBrowserPluginCompositing);
-  if (GetProcess()->IsGuest() && !guest_compositing_enabled) {
-    prefs.force_compositing_mode = false;
-    prefs.accelerated_compositing_enabled = false;
-  }
-
   return prefs;
 }