Created multi-process-friendly PowerMonitor interface.

content/common/gpu/gpu_channel.h

Index: content/common/gpu/gpu_channel.h
diff --git a/content/common/gpu/gpu_channel.h b/content/common/gpu/gpu_channel.h
index 7fdae98a03e1e40c8f3ff70df4fefb73b3891ed7..24ca4fcaa85c201034819b18ab9d09a5829945f6 100644
--- a/content/common/gpu/gpu_channel.h
+++ b/content/common/gpu/gpu_channel.h
@@ -52,6 +52,7 @@ class GpuChannelManager;
 struct GpuRenderingStats;
 class GpuWatchdog;
 class GpuChannelMessageFilter;
+class PowerMonitorMessageFilter;
 
 // Encapsulates an IPC channel between the GPU process and one renderer
 // process. On the renderer side there's a corresponding GpuChannelHost.
@@ -247,6 +248,7 @@ class GpuChannel : public IPC::Listener,
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   scoped_refptr<GpuChannelMessageFilter> filter_;
+  scoped_refptr<PowerMonitorMessageFilter> power_monitor_filter_;
   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 
   size_t num_stubs_descheduled_;