Battery Status API: blink promise implementation and layout tests.

Source/modules/battery/NavigatorBattery.cpp

Index: Source/modules/battery/NavigatorBattery.cpp
diff --git a/Source/modules/battery/NavigatorBattery.cpp b/Source/modules/battery/NavigatorBattery.cpp
index caaff759521c652ec60c0a3cd7d7c2bc01d6a656..b72e98f728fdc6b08e889b30b84fb271ccea0751 100644
--- a/Source/modules/battery/NavigatorBattery.cpp
+++ b/Source/modules/battery/NavigatorBattery.cpp
@@ -18,16 +18,17 @@ NavigatorBattery::~NavigatorBattery()
 {
 }
 
-BatteryManager* NavigatorBattery::battery(Navigator& navigator)
+ScriptPromise NavigatorBattery::getBattery(ScriptState* scriptState, Navigator& navigator)
 {
-    return NavigatorBattery::from(navigator).batteryManager(navigator);
+    return NavigatorBattery::from(navigator).getBattery(scriptState);
 }
 
-BatteryManager* NavigatorBattery::batteryManager(Navigator& navigator)
+ScriptPromise NavigatorBattery::getBattery(ScriptState* scriptState)
 {
-    if (!m_batteryManager && navigator.frame())
-        m_batteryManager = BatteryManager::create(navigator.frame()->document());
-    return m_batteryManager.get();
+    if (!m_batteryManager)
+        m_batteryManager = BatteryManager::create(scriptState->executionContext());
+
+    return m_batteryManager->startRequest(scriptState);
 }
 
 const char* NavigatorBattery::supplementName()