Mac: Always use surfaceless mode

content/browser/compositor/buffer_queue.cc

 // Copyright 2014 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/compositor/buffer_queue.h"
 
 #include "content/browser/compositor/image_transport_factory.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/common/gpu/client/gl_helper.h"
@@ skipping 200 matching lines @@
     return AllocatedSurface();
 
   // We don't want to allow anything more than triple buffering.
   DCHECK_LT(allocated_count_, 4U);
 
   scoped_ptr<gfx::GpuMemoryBuffer> buffer(
       gpu_memory_buffer_manager_->AllocateGpuMemoryBufferForScanout(
           size_, gpu::ImageFactory::DefaultBufferFormatForImageFormat(
                      internal_format_),
           surface_id_));
-  if (!buffer) {
+  if (!buffer.get()) {
     gl->DeleteTextures(1, &texture);
     DLOG(ERROR) << "Failed to allocate GPU memory buffer";
     return AllocatedSurface();
   }
 
   unsigned int id = gl->CreateImageCHROMIUM(
       buffer->AsClientBuffer(), size_.width(), size_.height(),
       internal_format_);
 
   if (!id) {
     LOG(ERROR) << "Failed to allocate backing image surface";
     gl->DeleteTextures(1, &texture);
     return AllocatedSurface();
   }
   allocated_count_++;
   gl->BindTexture(texture_target_, texture);
   gl->BindTexImage2DCHROMIUM(texture_target_, id);
-  return AllocatedSurface(texture, id, gfx::Rect(size_));
+  return AllocatedSurface(buffer.Pass(), texture, id, gfx::Rect(size_));
 }
 
+BufferQueue::AllocatedSurface::AllocatedSurface() : texture(0), image(0) {}
+
+BufferQueue::AllocatedSurface::AllocatedSurface(
+    scoped_ptr<gfx::GpuMemoryBuffer> buffer,
+    unsigned int texture,
+    unsigned int image,
+    const gfx::Rect& rect)
+    : buffer(buffer.release()), texture(texture), image(image), damage(rect) {}
+
+BufferQueue::AllocatedSurface::~AllocatedSurface() {}
+
 }  // namespace content