gpu: Add flag for enabling asynchronous worker context.

content/browser/gpu/gpu_ipc_browsertests.cc

Index: content/browser/gpu/gpu_ipc_browsertests.cc
diff --git a/content/browser/gpu/gpu_ipc_browsertests.cc b/content/browser/gpu/gpu_ipc_browsertests.cc
index bd1c0c85eef5eb251eefd0b0696ca40d49f083b9..fb20bfabfb5fa4ff2bad5aab262a1c3ff2868b61 100644
--- a/content/browser/gpu/gpu_ipc_browsertests.cc
+++ b/content/browser/gpu/gpu_ipc_browsertests.cc
@@ -37,7 +37,8 @@ scoped_refptr<content::ContextProviderCommandBuffer> CreateContext(
   attributes.bind_generates_resource = false;
   bool automatic_flushes = false;
   return make_scoped_refptr(new content::ContextProviderCommandBuffer(
-      std::move(gpu_channel_host), gpu::kNullSurfaceHandle, GURL(),
+      std::move(gpu_channel_host), gpu::GPU_STREAM_DEFAULT,
+      gpu::GpuStreamPriority::NORMAL, gpu::kNullSurfaceHandle, GURL(),
       gfx::PreferIntegratedGpu, automatic_flushes, gpu::SharedMemoryLimits(),
       attributes, nullptr,
       content::command_buffer_metrics::OFFSCREEN_CONTEXT_FOR_TESTING));