Created multi-process-friendly PowerMonitor interface.

content/browser/gpu/gpu_process_host_ui_shim.cc

Index: content/browser/gpu/gpu_process_host_ui_shim.cc
diff --git a/content/browser/gpu/gpu_process_host_ui_shim.cc b/content/browser/gpu/gpu_process_host_ui_shim.cc
index 2d0c4255db9441528954ce2e9da10c82e4edfeb8..2300b18b5e06e74d1602b5d3326f65d9d60e0d06 100644
--- a/content/browser/gpu/gpu_process_host_ui_shim.cc
+++ b/content/browser/gpu/gpu_process_host_ui_shim.cc
@@ -103,15 +103,18 @@ void RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg) {
     ui_shim->OnMessageReceived(msg);
 }
 
-GpuProcessHostUIShim::GpuProcessHostUIShim(int host_id)
+GpuProcessHostUIShim::GpuProcessHostUIShim(int host_id, bool single_process)
     : host_id_(host_id) {
   g_hosts_by_id.Pointer()->AddWithID(this, host_id_);
+  if (!single_process)
+    power_monitor_broadcaster_.reset(new PowerMonitorMessageBroadcaster(this));
 }
 
 // static
-GpuProcessHostUIShim* GpuProcessHostUIShim::Create(int host_id) {
+GpuProcessHostUIShim* GpuProcessHostUIShim::Create(int host_id,
+    bool single_process) {
   DCHECK(!FromID(host_id));
-  return new GpuProcessHostUIShim(host_id);
+  return new GpuProcessHostUIShim(host_id, single_process);
 }
 
 // static