gpu: Add flag for enabling asynchronous worker context.

content/browser/compositor/gpu_process_transport_factory.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/gpu_process_transport_factory.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 111 matching lines @@
   attributes.stencil_size = 0;
   attributes.samples = 0;
   attributes.sample_buffers = 0;
   attributes.bind_generates_resource = false;
   attributes.lose_context_when_out_of_memory = true;
 
   bool automatic_flushes = false;
 
   GURL url("chrome://gpu/GpuProcessTransportFactory::CreateContextCommon");
   return make_scoped_refptr(new content::ContextProviderCommandBuffer(
-      std::move(gpu_channel_host), surface_handle, url,
+      std::move(gpu_channel_host), gpu::GPU_STREAM_DEFAULT,
+      gpu::GpuStreamPriority::NORMAL, surface_handle, url,
       gfx::PreferIntegratedGpu, automatic_flushes, gpu::SharedMemoryLimits(),
       attributes, shared_context_provider, type));
 }
 
 #if defined(OS_MACOSX)
 bool IsCALayersDisabledFromCommandLine() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return command_line->HasSwitch(switches::kDisableMacOverlays);
 }
 #endif
@@ skipping 638 matching lines @@
       shared_vulkan_context_provider_ =
           cc::VulkanInProcessContextProvider::Create();
     }
 
     shared_vulkan_context_provider_initialized_ = true;
   }
   return shared_vulkan_context_provider_;
 }
 
 }  // namespace content