ozone: gpu: Add plumbing for platform-specific gpu messaging

content/browser/gpu/browser_gpu_channel_host_factory.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/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_client.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 #include "ipc/message_filter.h"
 
+#if defined(USE_OZONE)
+#include "ui/ozone/gpu/gpu_platform_support_host.h"
+#endif
+
 namespace content {
 
 BrowserGpuChannelHostFactory* BrowserGpuChannelHostFactory::instance_ = NULL;
 
 struct BrowserGpuChannelHostFactory::CreateRequest {
   CreateRequest()
       : event(true, false), gpu_host_id(0), route_id(MSG_ROUTING_NONE) {}
   ~CreateRequest() {}
   base::WaitableEvent event;
   int gpu_host_id;
@@ skipping 156 matching lines @@
   return GpuDataManager::GetInstance()->GpuAccessAllowed(NULL);
 }
 
 void BrowserGpuChannelHostFactory::Initialize(bool establish_gpu_channel) {
   DCHECK(!instance_);
   instance_ = new BrowserGpuChannelHostFactory();
   if (establish_gpu_channel) {
     instance_->EstablishGpuChannel(CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP,
                                    base::Closure());
   }
+#if defined(USE_OZONE)
+  ui::GpuPlatformSupportHost::Initialize();

[alexst (slow to review), 2014/06/16 21:34:23]

Do we need to explicitly init this here? Presumably the ozone platform was
initialized already and this could happen inside that code?

[spang, 2014/06/17 14:47:34]

Actually, our other initializer can't do this because it is a lower level
component. It would be a layering violation.

+#endif
 }
 
 void BrowserGpuChannelHostFactory::Terminate() {
   DCHECK(instance_);
   delete instance_;
   instance_ = NULL;
 }
 
 BrowserGpuChannelHostFactory::BrowserGpuChannelHostFactory()
     : gpu_client_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
@@ skipping 340 matching lines @@
     const gfx::GpuMemoryBufferHandle& handle,
     int32 sync_point) {
   GpuProcessHost* host = GpuProcessHost::FromID(gpu_host_id_);
   if (!host)
     return;
 
   host->DestroyGpuMemoryBuffer(handle, sync_point);
 }
 
 }  // namespace content