gpu: Add flag for enabling asynchronous worker context.

content/common/gpu/client/context_provider_command_buffer.cc

Index: content/common/gpu/client/context_provider_command_buffer.cc
diff --git a/content/common/gpu/client/context_provider_command_buffer.cc b/content/common/gpu/client/context_provider_command_buffer.cc
index 7c5e7fb64a50b6b3fa0544c589f53e03835c87e3..8bc3a03ad3c4a8e2db58be8e38a5594233e1873d 100644
--- a/content/common/gpu/client/context_provider_command_buffer.cc
+++ b/content/common/gpu/client/context_provider_command_buffer.cc
@@ -54,6 +54,8 @@ ContextProviderCommandBuffer::SharedProviders::~SharedProviders() = default;
 
 ContextProviderCommandBuffer::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,
@@ -62,7 +64,9 @@ ContextProviderCommandBuffer::ContextProviderCommandBuffer(
     const gpu::gles2::ContextCreationAttribHelper& attributes,
     ContextProviderCommandBuffer* shared_context_provider,
     command_buffer_metrics::ContextType type)
-    : surface_handle_(surface_handle),
+    : stream_id_(stream_id),
+      stream_priority_(stream_priority),
+      surface_handle_(surface_handle),
       active_url_(active_url),
       gpu_preference_(gpu_preference),
       automatic_flushes_(automatic_flushes),
@@ -142,10 +146,8 @@ bool ContextProviderCommandBuffer::BindToCurrentThread() {
     // This command buffer is a client-side proxy to the command buffer in the
     // GPU process.
     command_buffer_ = channel_->CreateCommandBuffer(
-        surface_handle_, gfx::Size(), shared_command_buffer,
-        gpu::GpuChannelHost::kDefaultStreamId,
-        gpu::GpuChannelHost::kDefaultStreamPriority, serialized_attributes,
-        active_url_, gpu_preference_);
+        surface_handle_, gfx::Size(), shared_command_buffer, stream_id_,
+        stream_priority_, serialized_attributes, active_url_, gpu_preference_);
     // The command buffer takes ownership of the |channel_|, so no need to keep
     // a reference around here.
     channel_ = nullptr;