ozone: Implement zero/one-copy texture for Ozone GBM.

content/common/gpu/client/gpu_memory_buffer_impl.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 "base/numerics/safe_math.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 18 matching lines @@
                                          const DestructionCallback& callback)
     : id_(id),
       size_(size),
       format_(format),
       callback_(callback),
       mapped_(false),
       destruction_sync_point_(0) {
 }
 
 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
+  DCHECK(!mapped_);

[reveman, 2015/05/11 16:40:56]

this is fine but unrelated to this change. please change it in a separate patch

[dshwang, 2015/05/14 12:25:46]

got it

   callback_.Run(destruction_sync_point_);
 }
 
 // static
 scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImpl::CreateFromHandle(
     const gfx::GpuMemoryBufferHandle& handle,
     const gfx::Size& size,
     Format format,
     const DestructionCallback& callback) {
   switch (handle.type) {
@@ skipping 141 matching lines @@
 
 bool GpuMemoryBufferImpl::IsMapped() const {
   return mapped_;
 }
 
 ClientBuffer GpuMemoryBufferImpl::AsClientBuffer() {
   return reinterpret_cast<ClientBuffer>(this);
 }
 
 }  // namespace content