Make disabling accelerated VPX decoding a GPU driver bug workaround.

services/ui/gpu/gpu_main.cc

 // Copyright 2016 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 "services/ui/gpu/gpu_main.h"
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "gpu/ipc/common/gpu_memory_buffer_support.h"
@@ skipping 202 matching lines @@
   gpu_memory_buffer_factory_.reset();
   gpu_init_.reset();
 }
 
 void GpuMain::CreateGpuServiceOnGpuThread(
     mojom::GpuServiceRequest request,
     mojom::GpuHostPtrInfo gpu_host_info,
     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()) {
     CreateDisplayCompositorInternal(
         std::move(pending_display_compositor_request_),
         std::move(pending_display_compositor_client_info_));
   }
 }
 
 void GpuMain::BindGpuInternalOnGpuThread(mojom::GpuServiceRequest request) {
   gpu_service_->Bind(std::move(request));
 }
 
 void GpuMain::PreSandboxStartup() {
   // TODO(sad): https://crbug.com/645602
 }
 
 bool GpuMain::EnsureSandboxInitialized(
     gpu::GpuWatchdogThread* watchdog_thread) {
   // TODO(sad): https://crbug.com/645602
   return true;
 }
 
 }  // namespace ui