Created multi-process-friendly PowerMonitor interface.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 221361feae2df5fe75e05fa3fe72fc60ca889f83..3b5148497a4a1004bdd39cf0950a0066f12bd7a1 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -11,6 +11,7 @@
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
+#include "base/power_monitor/power_monitor.h"
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
@@ -19,6 +20,7 @@
 #include "content/child/child_process.h"
 #include "content/common/gpu/gpu_config.h"
 #include "content/common/gpu/gpu_messages.h"
+#include "content/common/power_monitor_broadcast_source.h"
 #include "content/common/sandbox_linux.h"
 #include "content/gpu/gpu_child_thread.h"
 #include "content/gpu/gpu_process.h"
@@ -169,6 +171,9 @@ int GpuMain(const MainFunctionParams& parameters) {
   delayed_watchdog_enable = true;
 #endif
 
+  PowerMonitorBroadcastSource* power_monitor_source =
+      new PowerMonitorBroadcastSource();
+  base::PowerMonitor power_monitor(power_monitor_source);

[vandebo (ex-Chrome), 2013/07/02 22:53:12]

nit: base::PowerMonitor power_monitor(new PowerMonitorBroadcastSource()); ?

[bajones, 2013/07/03 20:32:27]

See line 292. The power_monitor_source is referenced later in this file.

   scoped_refptr<GpuWatchdogThread> watchdog_thread;
 
   // Start the GPU watchdog only after anything that is expected to be time
@@ -283,6 +288,9 @@ int GpuMain(const MainFunctionParams& parameters) {
                                                     dead_on_arrival,
                                                     gpu_info,
                                                     deferred_messages.Get());
+
+  child_thread->channel()->AddFilter(power_monitor_source->MessageFilter());
+
   while (!deferred_messages.Get().empty())
     deferred_messages.Get().pop();