gpu: Add flag for enabling asynchronous worker context.

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index b0c00a36de9c6851c4844da14c394df8fd87290e..159df0a1b9a605ba38ce04d338f4b888c3552096 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -664,7 +664,8 @@ void CompositorImpl::CreateOutputSurface() {
     limits.mapped_memory_reclaim_limit = full_screen_texture_size_in_bytes;
 
     context_provider = new 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, limits, attributes,
         nullptr, command_buffer_metrics::DISPLAY_COMPOSITOR_ONSCREEN_CONTEXT);
     DCHECK(context_provider.get());