Make disabling accelerated VPX decoding a GPU driver bug workaround.

gpu/ipc/service/gpu_channel_manager.h

Index: gpu/ipc/service/gpu_channel_manager.h
diff --git a/gpu/ipc/service/gpu_channel_manager.h b/gpu/ipc/service/gpu_channel_manager.h
index 3c11dee8e681c32fc49f728456701e34feecc589..b0a183acdecf95737c3118ebb08cdec3d07f54e1 100644
--- a/gpu/ipc/service/gpu_channel_manager.h
+++ b/gpu/ipc/service/gpu_channel_manager.h
@@ -34,6 +34,7 @@ class GLShareGroup;
 }
 
 namespace gpu {
+class GpuDriverBugWorkarounds;
 struct GpuPreferences;
 class PreemptionFlag;
 class SyncPointManager;
@@ -58,6 +59,7 @@ class GpuWatchdogThread;
 class GPU_EXPORT GpuChannelManager {
  public:
   GpuChannelManager(const GpuPreferences& gpu_preferences,
+                    const GpuDriverBugWorkarounds& workarounds,
                     GpuChannelManagerDelegate* delegate,
                     GpuWatchdogThread* watchdog,
                     scoped_refptr<base::SingleThreadTaskRunner> task_runner,