Replace context parenting by sharing through mailboxes

content/common/gpu/client/command_buffer_proxy_impl.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/common/gpu/client/command_buffer_proxy_impl.h"
 
 #include "base/callback.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 426 matching lines @@
 
 bool CommandBufferProxyImpl::GenerateMailboxNames(
     unsigned num,
     std::vector<gpu::Mailbox>* names) {
   if (last_state_.error != gpu::error::kNoError)
     return false;
 
   return channel_->GenerateMailboxNames(num, names);
 }
 
-bool CommandBufferProxyImpl::SetParent(
-    CommandBufferProxy* parent_command_buffer,
-    uint32 parent_texture_id) {
+bool CommandBufferProxyImpl::ProduceFrontBuffer(const gpu::Mailbox& mailbox) {
   if (last_state_.error != gpu::error::kNoError)
     return false;
 
-  bool result;
-  if (parent_command_buffer) {
-    if (!Send(new GpuCommandBufferMsg_SetParent(
-        route_id_,
-        parent_command_buffer->GetRouteID(),
-        parent_texture_id,
-        &result))) {
-      return false;
-    }
-  } else {
-    if (!Send(new GpuCommandBufferMsg_SetParent(
-        route_id_,
-        MSG_ROUTING_NONE,
-        0,
-        &result))) {
-      return false;
-    }
-  }
-
-  return result;
+  return Send(new GpuCommandBufferMsg_ProduceFrontBuffer(route_id_, mailbox));
 }
 
 scoped_ptr<media::VideoDecodeAccelerator>
 CommandBufferProxyImpl::CreateVideoDecoder(
     media::VideoCodecProfile profile,
     media::VideoDecodeAccelerator::Client* client) {
   int decoder_route_id;
   scoped_ptr<media::VideoDecodeAccelerator> vda;
   if (!Send(new GpuCommandBufferMsg_CreateVideoDecoder(route_id_, profile,
                                                        &decoder_route_id))) {
@@ skipping 60 matching lines @@
 void CommandBufferProxyImpl::SendManagedMemoryStats(
     const GpuManagedMemoryStats& stats) {
   if (last_state_.error != gpu::error::kNoError)
     return;
 
   Send(new GpuCommandBufferMsg_SendClientManagedMemoryStats(route_id_,
                                                             stats));
 }
 
 }  // namespace content