content: Add command line flag for native GPU memory buffers.

content/common/gpu/client/gpu_memory_buffer_impl_mac.cc

 // Copyright 2013 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/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "base/logging.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h"
 
 namespace content {
 
 // static
 void GpuMemoryBufferImpl::GetSupportedTypes(
     std::vector<gfx::GpuMemoryBufferType>* types) {
   const gfx::GpuMemoryBufferType supported_types[] = {
-    gfx::IO_SURFACE_BUFFER,
-    gfx::SHARED_MEMORY_BUFFER
+    gfx::SHARED_MEMORY_BUFFER,
+    gfx::IO_SURFACE_BUFFER
   };
   types->assign(supported_types, supported_types + arraysize(supported_types));
 }
 
 // static
 bool GpuMemoryBufferImpl::IsConfigurationSupported(
     gfx::GpuMemoryBufferType type,
     Format format,
     Usage usage) {
   switch (type) {
@@ skipping 89 matching lines @@
     case gfx::IO_SURFACE_BUFFER:
       return GpuMemoryBufferImplIOSurface::CreateFromHandle(
           handle, size, format, callback);
     default:
       NOTREACHED();
       return scoped_ptr<GpuMemoryBufferImpl>();
   }
 }
 
 }  // namespace content