Make disabling accelerated VPX decoding a GPU driver bug workaround.

services/ui/gpu/gpu_main.cc

Index: services/ui/gpu/gpu_main.cc
diff --git a/services/ui/gpu/gpu_main.cc b/services/ui/gpu/gpu_main.cc
index a87c7cbe39cdfe1054435e7b8eae149a32dd706b..24e668d3ab41c10b7aed262390897a056a4d7ec4 100644
--- a/services/ui/gpu/gpu_main.cc
+++ b/services/ui/gpu/gpu_main.cc
@@ -220,7 +220,10 @@ void GpuMain::CreateGpuServiceOnGpuThread(
     const gpu::GpuPreferences& preferences) {
   mojom::GpuHostPtr gpu_host;
   gpu_host.Bind(std::move(gpu_host_info));
-  gpu_service_->InitializeWithHost(std::move(gpu_host), preferences);
+  gpu::GpuDriverBugWorkarounds workarounds(

[Zhenyao Mo, 2017/02/13 22:14:27]

We actually recomputed workarounds on GPU process startup.  You should use that
instead.

See gpu_init.cc.

Not sure how you wire that to here though.

+      base::CommandLine::ForCurrentProcess());
+  gpu_service_->InitializeWithHost(std::move(gpu_host), preferences,
+                                   workarounds);
   gpu_service_->Bind(std::move(request));
 
   if (pending_display_compositor_request_.is_pending()) {