Oilpan: Prepare moving inspector script related classes to oilpan.

Source/core/frame/DOMWindow.cpp

Index: Source/core/frame/DOMWindow.cpp
diff --git a/Source/core/frame/DOMWindow.cpp b/Source/core/frame/DOMWindow.cpp
index 3c7614f1e4c203d0981ea3912ec15411c51996b3..d844bf62a79fd4791f84cfa14e78bfb5d612ee6b 100644
--- a/Source/core/frame/DOMWindow.cpp
+++ b/Source/core/frame/DOMWindow.cpp
@@ -115,7 +115,7 @@ namespace WebCore {
 
 class PostMessageTimer FINAL : public SuspendableTimer {
 public:
-    PostMessageTimer(DOMWindow& window, PassRefPtr<SerializedScriptValue> message, const String& sourceOrigin, PassRefPtrWillBeRawPtr<DOMWindow> source, PassOwnPtr<MessagePortChannelArray> channels, SecurityOrigin* targetOrigin, PassRefPtr<ScriptCallStack> stackTrace, UserGestureToken* userGestureToken)
+    PostMessageTimer(DOMWindow& window, PassRefPtr<SerializedScriptValue> message, const String& sourceOrigin, PassRefPtrWillBeRawPtr<DOMWindow> source, PassOwnPtr<MessagePortChannelArray> channels, SecurityOrigin* targetOrigin, PassRefPtrWillBeRawPtr<ScriptCallStack> stackTrace, UserGestureToken* userGestureToken)
         : SuspendableTimer(window.document())
         , m_window(window)
         , m_message(message)
@@ -150,7 +150,7 @@ private:
     RefPtrWillBePersistent<DOMWindow> m_source;
     OwnPtr<MessagePortChannelArray> m_channels;
     RefPtr<SecurityOrigin> m_targetOrigin;
-    RefPtr<ScriptCallStack> m_stackTrace;
+    RefPtrWillBePersistent<ScriptCallStack> m_stackTrace;
     RefPtr<UserGestureToken> m_userGestureToken;
 };
 
@@ -859,7 +859,7 @@ void DOMWindow::postMessage(PassRefPtr<SerializedScriptValue> message, const Mes
         UseCounter::count(document(), UseCounter::PostMessageFromInsecureToSecure);
 
     // Capture stack trace only when inspector front-end is loaded as it may be time consuming.
-    RefPtr<ScriptCallStack> stackTrace;
+    RefPtrWillBeRawPtr<ScriptCallStack> stackTrace = nullptr;
     if (InspectorInstrumentation::consoleAgentEnabled(sourceDocument))
         stackTrace = createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture, true);
 
@@ -890,7 +890,7 @@ void DOMWindow::postMessageTimerFired(PassOwnPtr<PostMessageTimer> t)
     dispatchMessageEventWithOriginCheck(timer->targetOrigin(), event, timer->stackTrace());
 }
 
-void DOMWindow::dispatchMessageEventWithOriginCheck(SecurityOrigin* intendedTargetOrigin, PassRefPtrWillBeRawPtr<Event> event, PassRefPtr<ScriptCallStack> stackTrace)
+void DOMWindow::dispatchMessageEventWithOriginCheck(SecurityOrigin* intendedTargetOrigin, PassRefPtrWillBeRawPtr<Event> event, PassRefPtrWillBeRawPtr<ScriptCallStack> stackTrace)
 {
     if (intendedTargetOrigin) {
         // Check target origin now since the target document may have changed since the timer was scheduled.