chromeos: Add power supply info reading capability

chrome/browser/automation/testing_automation_provider.h

Index: chrome/browser/automation/testing_automation_provider.h
diff --git a/chrome/browser/automation/testing_automation_provider.h b/chrome/browser/automation/testing_automation_provider.h
index 79a55c6ebde69f4df6efffc439152c0ec26eac87..b5260a3ee7d3841ec4320be736a2875294db7836 100644
--- a/chrome/browser/automation/testing_automation_provider.h
+++ b/chrome/browser/automation/testing_automation_provider.h
@@ -43,7 +43,7 @@ class TestingAutomationProvider : public AutomationProvider,
                                   public BrowserList::Observer,
                                   public importer::ImporterListObserver,
 #if defined(OS_CHROMEOS)
-                                  public chromeos::PowerLibrary::Observer,
+                                  public chromeos::PowerManagerClient::Observer,
 #endif // defined(OS_CHROMEOS)
                                   public content::NotificationObserver {
 
@@ -1353,9 +1353,8 @@ class TestingAutomationProvider : public AutomationProvider,
                            DictionaryValue* args,
                            IPC::Message* reply_message);
 
-  // chromeos::PowerLibrary::Observer overrides.
+  // chromeos::PowerManagerClient::Observer overrides.
   virtual void PowerChanged(const chromeos::PowerSupplyStatus& status) OVERRIDE;
-  virtual void SystemResumed() OVERRIDE {}
 #endif  // defined(OS_CHROMEOS)
 
   void WaitForTabCountToBecome(int browser_handle,