chromeos: Simplify power supply info in PowerLibrary

chrome/browser/automation/testing_automation_provider_chromeos.cc

Index: chrome/browser/automation/testing_automation_provider_chromeos.cc
diff --git a/chrome/browser/automation/testing_automation_provider_chromeos.cc b/chrome/browser/automation/testing_automation_provider_chromeos.cc
index 66a3d91d891e4be73fb32abe5f30533d26b840ad..8680977773db1c39d87e584915cdb054b5eb154b 100644
--- a/chrome/browser/automation/testing_automation_provider_chromeos.cc
+++ b/chrome/browser/automation/testing_automation_provider_chromeos.cc
@@ -210,6 +210,11 @@ DictionaryValue* CreateDictionaryWithPolicies(
 
 }  // namespace
 
+void TestingAutomationProvider::PowerChanged(
+    const chromeos::PowerSupplyStatus& status) {
+  power_status_ = status;
+}
+
 void TestingAutomationProvider::GetLoginInfo(DictionaryValue* args,
                                              IPC::Message* reply_message) {
   AutomationJSONReply reply(this, reply_message);
@@ -342,23 +347,22 @@ void TestingAutomationProvider::GetBatteryInfo(DictionaryValue* args,
   if (!EnsureCrosLibraryLoaded(this, reply_message))
     return;
 
-  chromeos::PowerLibrary* power_library = CrosLibrary::Get()->GetPowerLibrary();
   scoped_ptr<DictionaryValue> return_value(new DictionaryValue);
 
   return_value->SetBoolean("battery_is_present",
-                           power_library->IsBatteryPresent());
-  return_value->SetBoolean("line_power_on", power_library->IsLinePowerOn());
-  if (power_library->IsBatteryPresent()) {
+                           power_status_.battery_is_present);
+  return_value->SetBoolean("line_power_on", power_status_.line_power_on);
+  if (power_status_.battery_is_present) {
     return_value->SetBoolean("battery_fully_charged",
-                             power_library->IsBatteryFullyCharged());
+                             power_status_.battery_is_full);
     return_value->SetDouble("battery_percentage",
-                            power_library->GetBatteryPercentage());
-    if (power_library->IsLinePowerOn()) {
-      int time = power_library->GetBatteryTimeToFull().InSeconds();
-      if (time > 0 || power_library->IsBatteryFullyCharged())
+                            power_status_.battery_percentage);
+    if (power_status_.line_power_on) {
+      int64 time = power_status_.battery_time_to_full;
+      if (time > 0 || power_status_.battery_is_full)
         return_value->SetInteger("battery_time_to_full", time);
     } else {
-      int time = power_library->GetBatteryTimeToEmpty().InSeconds();
+      int64 time = power_status_.battery_time_to_empty;
       if (time > 0)
         return_value->SetInteger("battery_time_to_empty", time);
     }