Oilpan: Allowing hashing of RawPtr.

Source/heap/Handle.h

Index: Source/heap/Handle.h
diff --git a/Source/heap/Handle.h b/Source/heap/Handle.h
index e90b7c882c76a7cd4774fe8adc84b4c813289767..d4ef8f136401f67d5e8737fc7e0ea2fa51491f74 100644
--- a/Source/heap/Handle.h
+++ b/Source/heap/Handle.h
@@ -727,10 +727,9 @@ template<typename T> struct HashTraits<WebCore::Member<T> > : SimpleClassHashTra
     typedef RawPtr<T> PassInType;
     typedef WebCore::Member<T>* IteratorGetType;
     typedef const WebCore::Member<T>* IteratorConstGetType;
-    typedef T* IteratorReferenceType;
-    typedef T* IteratorConstReferenceType;
-    static IteratorConstGetType getToConstGetConversion(const WebCore::Member<T>* x) { return x->get(); }
-    static IteratorReferenceType getToReferenceConversion(IteratorGetType x) { return x->get(); }
+    typedef WebCore::Member<T>& IteratorReferenceType;
+    typedef T* const IteratorConstReferenceType;
+    static IteratorReferenceType getToReferenceConversion(IteratorGetType x) { return *x; }
     static IteratorConstReferenceType getToReferenceConstConversion(IteratorConstGetType x) { return x->get(); }
     // FIXME: Similarly, there is no need for a distinction between PeekOutType
     // and PassOutType without reference counting.
@@ -755,10 +754,9 @@ template<typename T> struct HashTraits<WebCore::WeakMember<T> > : SimpleClassHas
     typedef RawPtr<T> PassInType;
     typedef WebCore::WeakMember<T>* IteratorGetType;
     typedef const WebCore::WeakMember<T>* IteratorConstGetType;
-    typedef T* IteratorReferenceType;
-    typedef T* IteratorConstReferenceType;
-    static IteratorConstGetType getToConstGetConversion(const WebCore::WeakMember<T>* x) { return x->get(); }
-    static IteratorReferenceType getToReferenceConversion(IteratorGetType x) { return x->get(); }
+    typedef WebCore::WeakMember<T>& IteratorReferenceType;
+    typedef T* const IteratorConstReferenceType;
+    static IteratorReferenceType getToReferenceConversion(IteratorGetType x) { return *x; }
     static IteratorConstReferenceType getToReferenceConstConversion(IteratorConstGetType x) { return x->get(); }
     // FIXME: Similarly, there is no need for a distinction between PeekOutType
     // and PassOutType without reference counting.