Do not create GpuVideoAcceleratorFactories if kDisableGpuCompositing is set

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index ee35e8d3fd3ee9969efb6cc66d93c71d77167986..7f873eace568ec81f618b60a8d50e4040ba67455 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1387,6 +1387,11 @@ void RenderThreadImpl::PostponeIdleNotification() {
 media::GpuVideoAcceleratorFactories* RenderThreadImpl::GetGpuFactories() {
   DCHECK(IsMainThread());
 
+  // XXX: solution1
+  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
+  if (cmd_line->HasSwitch(switches::kDisableGpuCompositing))
+    return nullptr;
+
   if (!gpu_factories_.empty()) {
     scoped_refptr<ContextProviderCommandBuffer> shared_context_provider =
         gpu_factories_.back()->ContextProviderMainThread();
@@ -1408,8 +1413,6 @@ media::GpuVideoAcceleratorFactories* RenderThreadImpl::GetGpuFactories() {
     }
   }
 
-  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
-
   scoped_refptr<gpu::GpuChannelHost> gpu_channel_host =
       EstablishGpuChannelSync(CAUSE_FOR_GPU_LAUNCH_MEDIA_CONTEXT);
   if (!gpu_channel_host)
@@ -1427,6 +1430,8 @@ media::GpuVideoAcceleratorFactories* RenderThreadImpl::GetGpuFactories() {
   const bool enable_video_accelerator =
       !cmd_line->HasSwitch(switches::kDisableAcceleratedVideoDecode);
   const bool enable_gpu_memory_buffer_video_frames =
+      // XXX: solution2
+      // !cmd_line->HasSwitch(switches::kDisableGpuCompositing) &&
 #if defined(OS_MACOSX) || defined(OS_LINUX)
       !cmd_line->HasSwitch(switches::kDisableGpuMemoryBufferVideoFrames);
 #else