Only add rescheduled message when there are commands to reschedule.

content/common/gpu/gpu_command_buffer_stub.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_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 111 matching lines @@
   // Sets buffer usage depending on Memory Allocation
   virtual void SetMemoryAllocation(
       const GpuMemoryAllocation& allocation) OVERRIDE;
 
   // Whether this command buffer can currently handle IPC messages.
   bool IsScheduled();
 
   // Whether this command buffer needs to be polled again in the future.
   bool HasMoreWork();
 
+  // Whether there are commands in the buffer that haven't been processed.
+  bool HasUnprocessedCommands();
+
   gpu::gles2::GLES2Decoder* decoder() const { return decoder_.get(); }
   gpu::GpuScheduler* scheduler() const { return scheduler_.get(); }
 
   // Identifies the target surface.
   int32 surface_id() const {
     return (surface_state_.get()) ? surface_state_->surface_id : 0;
   }
 
   // Identifies the various GpuCommandBufferStubs in the GPU process belonging
   // to the same renderer process.
@@ skipping 87 matching lines @@
   IDMap<GpuVideoDecodeAccelerator, IDMapOwnPointer> video_decoders_;
 
   ObserverList<DestructionObserver> destruction_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_