Move PlatformEventDispatcher implementations to the Oilpan heap.

Source/modules/battery/BatteryDispatcher.cpp

Index: Source/modules/battery/BatteryDispatcher.cpp
diff --git a/Source/modules/battery/BatteryDispatcher.cpp b/Source/modules/battery/BatteryDispatcher.cpp
index f71d9c6f2c773866d946e807d80c29f4255e291b..446d67c53e17b7268e6c536e7748e4995a79eb84 100644
--- a/Source/modules/battery/BatteryDispatcher.cpp
+++ b/Source/modules/battery/BatteryDispatcher.cpp
@@ -13,8 +13,8 @@ namespace blink {
 
 BatteryDispatcher& BatteryDispatcher::instance()
 {
-    DEFINE_STATIC_LOCAL(BatteryDispatcher, batteryDispatcher, ());
-    return batteryDispatcher;
+    DEFINE_STATIC_LOCAL(Persistent<BatteryDispatcher>, batteryDispatcher, (new BatteryDispatcher()));
+    return *batteryDispatcher;
 }
 
 BatteryDispatcher::BatteryDispatcher()
@@ -25,6 +25,12 @@ BatteryDispatcher::~BatteryDispatcher()
 {
 }
 
+void BatteryDispatcher::trace(Visitor* visitor)
+{
+    visitor->trace(m_batteryStatus);
+    PlatformEventDispatcher::trace(visitor);
+}
+
 void BatteryDispatcher::updateBatteryStatus(const WebBatteryStatus& batteryStatus)
 {
     m_batteryStatus = BatteryStatus::create(batteryStatus.charging, batteryStatus.chargingTime, batteryStatus.dischargingTime, batteryStatus.level);