Create PowerMonitor while starting aura_demo and views_examples_exe

R=sky

Review URL: https://codereview.chromium.org/910453002

Cr-Commit-Position: refs/heads/master@{#315325}

ui/aura/demo/demo_main.cc

@@ -7,6 +7,8 @@
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/power_monitor/power_monitor.h"
+#include "base/power_monitor/power_monitor_device_source.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/aura/client/default_capture_client.h"
 #include "ui/aura/client/window_tree_client.h"
@@ -126,6 +128,9 @@ int DemoMain() {
   // Create the message-loop here before creating the root window.
   base::MessageLoopForUI message_loop;
 
+  base::PowerMonitor power_monitor(make_scoped_ptr(
+      new base::PowerMonitorDeviceSource));
+
   aura::Env::CreateInstance(true);
   aura::Env::GetInstance()->set_context_factory(context_factory.get());
   scoped_ptr<aura::TestScreen> test_screen(

ui/views/examples/examples_main.cc

@@ -8,6 +8,8 @@
 #include "base/i18n/icu_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "base/power_monitor/power_monitor.h"
+#include "base/power_monitor/power_monitor_device_source.h"
 #include "base/run_loop.h"
 #include "ui/base/ime/input_method_initializer.h"
 #include "ui/base/resource/resource_bundle.h"
@@ -70,6 +72,9 @@ int main(int argc, char** argv) {
   DCHECK(PathService::Get(ui::UI_TEST_PAK, &ui_test_pak_path));
   ui::ResourceBundle::InitSharedInstanceWithPakPath(ui_test_pak_path);
 
+  base::PowerMonitor power_monitor(make_scoped_ptr(
+      new base::PowerMonitorDeviceSource));
+
 #if defined(OS_WIN)
     gfx::win::MaybeInitializeDirectWrite();
 #endif