Revert 228225 "Enable delegated rendering on Aura Windows and Li..."

content/browser/gpu/compositor_util.cc

Index: content/browser/gpu/compositor_util.cc
===================================================================
--- content/browser/gpu/compositor_util.cc	(revision 228384)
+++ content/browser/gpu/compositor_util.cc	(working copy)
@@ -112,12 +112,6 @@
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   bool enabled = false;
 
-#if defined(USE_AURA) && !defined(OS_CHROMEOS)
-  // Enable on non-ChromeOS Aura. Chrome OS has driver issues on some platforms:
-  // https://code.google.com/p/chrome-os-partner/issues/detail?id=22688
-  enabled = true;
-#endif
-
   // Flags override.
   enabled |= command_line.HasSwitch(switches::kEnableDelegatedRenderer);
   enabled &= !command_line.HasSwitch(switches::kDisableDelegatedRenderer);