Oilpan: move MessagePortArray to the heap.

Source/core/dom/MessagePort.h

Index: Source/core/dom/MessagePort.h
diff --git a/Source/core/dom/MessagePort.h b/Source/core/dom/MessagePort.h
index 648f574979ad82604683fd83065beb61c631aa4e..781c9bb1eff6fd24e644156b4a7c0ae778ed33b5 100644
--- a/Source/core/dom/MessagePort.h
+++ b/Source/core/dom/MessagePort.h
@@ -51,7 +51,7 @@ class ExecutionContext;
 class SerializedScriptValue;
 
 // The overwhelmingly common case is sending a single port, so handle that efficiently with an inline buffer of size 1.
-typedef Vector<RefPtr<MessagePort>, 1> MessagePortArray;
+typedef WillBeHeapVector<RefPtrWillBeMember<MessagePort>, 1> MessagePortArray;
 
 // Not to be confused with blink::WebMessagePortChannelArray; this one uses Vector and OwnPtr instead of WebVector and raw pointers.
 typedef Vector<OwnPtr<blink::WebMessagePortChannel>, 1> MessagePortChannelArray;
@@ -76,13 +76,13 @@ public:
     PassOwnPtr<blink::WebMessagePortChannel> disentangle();
 
     static PassOwnPtr<blink::WebMessagePortChannelArray> toWebMessagePortChannelArray(PassOwnPtr<MessagePortChannelArray>);
-    static PassOwnPtr<MessagePortArray> toMessagePortArray(ExecutionContext*, const blink::WebMessagePortChannelArray&);
+    static PassOwnPtrWillBeRawPtr<MessagePortArray> toMessagePortArray(ExecutionContext*, const blink::WebMessagePortChannelArray&);
 
     // Returns 0 if there is an exception, or if the passed-in array is 0/empty.
     static PassOwnPtr<MessagePortChannelArray> disentanglePorts(const MessagePortArray*, ExceptionState&);
 
     // Returns 0 if the passed array is 0/empty.
-    static PassOwnPtr<MessagePortArray> entanglePorts(ExecutionContext&, PassOwnPtr<MessagePortChannelArray>);
+    static PassOwnPtrWillBeRawPtr<MessagePortArray> entanglePorts(ExecutionContext&, PassOwnPtr<MessagePortChannelArray>);
 
     bool started() const { return m_started; }