Revert of Enable GPU Raster on OSX

content/browser/gpu/compositor_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/gpu/compositor_util.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 211 matching lines @@
 
   if (command_line.HasSwitch(switches::kDisableGpuRasterization))
     return false;
   else if (command_line.HasSwitch(switches::kEnableGpuRasterization))
     return true;
 
   if (IsGpuRasterizationBlacklisted()) {
     return false;
   }
 
-#if defined(OS_ANDROID) || defined(OS_MACOSX)
+#if defined(OS_ANDROID)
   return true;
 #endif
 
-  // explicitly disable GPU rasterization on all non-android and non-mac devices
-  // until we have full test coverage.
+  // explicitly disable GPU rasterization on all non-android devices until we
+  // have full test coverage.
   return false;
 }
 
 bool IsForceGpuRasterizationEnabled() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   return command_line.HasSwitch(switches::kForceGpuRasterization);
 }
 
 int GpuRasterizationMSAASampleCount() {
@@ skipping 115 matching lines @@
     }
   }
   return problem_list;
 }
 
 std::vector<std::string> GetDriverBugWorkarounds() {
   return GpuDataManagerImpl::GetInstance()->GetDriverBugWorkarounds();
 }
 
 }  // namespace content