gpu: Add flag for enabling asynchronous worker context.

content/common/gpu/client/context_provider_command_buffer.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER_H_
 #define CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "cc/output/context_provider.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/client/command_buffer_metrics.h"
 #include "gpu/command_buffer/client/shared_memory_limits.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
+#include "gpu/ipc/common/gpu_stream_constants.h"
 #include "gpu/ipc/common/surface_handle.h"
 #include "ui/gl/gpu_preference.h"
 #include "url/gurl.h"
 
 namespace gpu {
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 class TransferBuffer;
 namespace gles2 {
 class GLES2CmdHelper;
 class GLES2Implementation;
 class GLES2TraceImplementation;
 }
 }
 
 namespace skia_bindings {
 class GrContextForGLES2Interface;
 }
 
 namespace content {
 class WebGraphicsContext3DCommandBufferImpl;
 
 // Implementation of cc::ContextProvider that provides a GL implementation over
 // command buffer to the GPU process.
 class CONTENT_EXPORT ContextProviderCommandBuffer
     : NON_EXPORTED_BASE(public cc::ContextProvider) {
  public:
   ContextProviderCommandBuffer(
       scoped_refptr<gpu::GpuChannelHost> channel,
+      int32_t stream_id,
+      gpu::GpuStreamPriority stream_priority,
       gpu::SurfaceHandle surface_handle,
       const GURL& active_url,
       gfx::GpuPreference gpu_preference,
       bool automatic_flushes,
       const gpu::SharedMemoryLimits& memory_limits,
       const gpu::gles2::ContextCreationAttribHelper& attributes,
       ContextProviderCommandBuffer* shared_context_provider,
       command_buffer_metrics::ContextType type);
 
   gpu::CommandBufferProxyImpl* GetCommandBufferProxy();
@@ skipping 32 matching lines @@
     friend class base::RefCountedThreadSafe<SharedProviders>;
     ~SharedProviders();
   };
 
   base::ThreadChecker main_thread_checker_;
   base::ThreadChecker context_thread_checker_;
 
   bool bind_succeeded_ = false;
   bool bind_failed_ = false;
 
+  int32_t stream_id_;
+  gpu::GpuStreamPriority stream_priority_;
   gpu::SurfaceHandle surface_handle_;
   GURL active_url_;
   gfx::GpuPreference gpu_preference_;
   bool automatic_flushes_;
   gpu::SharedMemoryLimits memory_limits_;
   gpu::gles2::ContextCreationAttribHelper attributes_;
   command_buffer_metrics::ContextType context_type_;
 
   scoped_refptr<SharedProviders> shared_providers_;
   scoped_refptr<gpu::GpuChannelHost> channel_;
 
   base::Lock context_lock_;  // Referenced by command_buffer_.
   std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_;
   std::unique_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
   std::unique_ptr<gpu::TransferBuffer> transfer_buffer_;
   std::unique_ptr<gpu::gles2::GLES2Implementation> gles2_impl_;
   std::unique_ptr<gpu::gles2::GLES2TraceImplementation> trace_impl_;
   std::unique_ptr<skia_bindings::GrContextForGLES2Interface> gr_context_;
 
   LostContextCallback lost_context_callback_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_CONTEXT_PROVIDER_COMMAND_BUFFER_H_