content/gpu: Simplify stub scheduling.

content/common/gpu/gpu_channel.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 90 matching lines @@
   bool OnMessageReceived(const IPC::Message& msg) override;
   void OnChannelError() override;
 
   // IPC::Sender implementation:
   bool Send(IPC::Message* msg) override;
 
   // SubscriptionRefSet::Observer implementation
   void OnAddSubscription(unsigned int target) override;
   void OnRemoveSubscription(unsigned int target) override;
 
-  // This is called when a command buffer transitions from the unscheduled
-  // state to the scheduled state, which potentially means the channel
-  // transitions from the unscheduled to the scheduled state. When this occurs
-  // deferred IPC messaged are handled.
-  void OnScheduled();
-
   // This is called when a command buffer transitions between scheduled and
   // descheduled states. When any stub is descheduled, we stop preempting
   // other channels.
-  void StubSchedulingChanged(bool scheduled);
+  void OnStubSchedulingChanged(GpuCommandBufferStub* stub, bool scheduled);
 
   CreateCommandBufferResult CreateViewCommandBuffer(
       const gfx::GLSurfaceHandle& window,
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id);
 
   gfx::GLShareGroup* share_group() const { return share_group_.get(); }
 
   GpuCommandBufferStub* LookupCommandBuffer(int32 route_id);
@@ skipping 339 matching lines @@
 
   base::WeakPtr<GpuChannel> gpu_channel_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_