Use Surfaces on Windows, Linux, and Mac OS (try #6)

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 "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 298 matching lines @@
 
   if (command_line.HasSwitch(switches::kDisableThreadedGpuRasterization))
     return false;
 
   return true;
 }
 
 bool UseSurfacesEnabled() {
 #if defined(OS_ANDROID)
   return false;
-#else
+#endif
+  bool enabled = false;
+#if (defined(USE_AURA) && !defined(OS_CHROMEOS)) || defined(OS_MACOSX)
+  enabled = true;
+#endif
+
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
-  return command_line.HasSwitch(switches::kUseSurfaces);
-#endif
+  // Flags override.
+  enabled |= command_line.HasSwitch(switches::kUseSurfaces);
+  enabled &= !command_line.HasSwitch(switches::kDisableSurfaces);
+  return enabled;
 }
 
 int GpuRasterizationMSAASampleCount() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   if (!command_line.HasSwitch(switches::kGpuRasterizationMSAASampleCount))
     return 0;
   std::string string_value = command_line.GetSwitchValueASCII(
       switches::kGpuRasterizationMSAASampleCount);
@@ skipping 104 matching lines @@
     }
   }
   return problem_list;
 }
 
 std::vector<std::string> GetDriverBugWorkarounds() {
   return GpuDataManagerImpl::GetInstance()->GetDriverBugWorkarounds();
 }
 
 }  // namespace content