Oilpan: Allowing hashing of RawPtr.

Source/heap/HeapTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2591 matching lines @@
         VectorObjectNoTrace n1, n2;
         vectorNoTrace.append(n1);
         vectorNoTrace.append(n2);
         Heap::collectGarbage(ThreadState::NoHeapPointersOnStack);
         EXPECT_EQ(2, SimpleFinalizedObject::s_destructorCalls);
     }
     Heap::collectGarbage(ThreadState::NoHeapPointersOnStack);
     EXPECT_EQ(8, SimpleFinalizedObject::s_destructorCalls);
 }
 
+TEST(HeapTest, RawPtrInHash)
+{
+    HashSet<RawPtr<int> > set;
+    set.add(new int(42));
+    set.add(new int(42));
+    EXPECT_EQ(2u, set.size());
+    for (HashSet<RawPtr<int> >::iterator it = set.begin(); it != set.end(); ++it)
+        EXPECT_EQ(42, **it);
+}
+
 } // WebCore namespace
 
 namespace WTF {
 
 // We need the below vector trait specialization for the above HeapVectors to behave correctly wrt. memset, memcmp etc.
 template<> struct VectorTraits<WebCore::VectorObject> : public SimpleClassVectorTraits<WebCore::VectorObject> { };
 template<> struct VectorTraits<WebCore::VectorObjectInheritedTrace> : public SimpleClassVectorTraits<WebCore::VectorObjectInheritedTrace> { };
 template<> struct VectorTraits<WebCore::VectorObjectNoTrace> : public SimpleClassVectorTraits<WebCore::VectorObjectNoTrace> { };
 
 } // WTF namespace