Created multi-process-friendly PowerMonitor interface.

content/child/child_thread.h

Index: content/child/child_thread.h
diff --git a/content/child/child_thread.h b/content/child/child_thread.h
index 173fa2f6545d2a69f4ed7b5b6ecabdc44bcdb973..c84b60222ce57cced7adf250d2f5440759de3ce9 100644
--- a/content/child/child_thread.h
+++ b/content/child/child_thread.h
@@ -9,6 +9,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
+#include "base/power_monitor/power_monitor.h"
+#include "base/timer/hi_res_timer_manager.h"
 #include "base/tracked_objects.h"
 #include "content/common/content_export.h"
 #include "content/common/message_router.h"
@@ -201,6 +203,9 @@ class CONTENT_EXPORT ChildThread : public IPC::Listener, public IPC::Sender {
   // starts profiling the tcmalloc heap.
   scoped_ptr<base::debug::TraceMemoryController> trace_memory_controller_;
 
+  scoped_ptr<base::PowerMonitor> power_monitor_;
+  scoped_ptr<base::HighResolutionTimerManager> hi_res_timer_manager_;
+
   DISALLOW_COPY_AND_ASSIGN(ChildThread);
 };