Have uses of MockImageResourceClient leak less.

Source/core/fetch/RawResourceTest.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 25 matching lines @@
 #include "core/fetch/MockImageResourceClient.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/fetch/ResourcePtr.h"
 #include "platform/SharedBuffer.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLResponse.h"
 #include "public/platform/WebUnitTestSupport.h"
 
+#include <gtest/gtest.h>
+
 namespace blink {
 
 TEST(RawResourceTest, DontIgnoreAcceptForCacheReuse)
 {
     ResourceRequest jpegRequest;
     jpegRequest.setHTTPAccept("image/jpeg");
 
     ResourcePtr<RawResource> jpegResource(new RawResource(jpegRequest, Resource::Raw));
 
     ResourceRequest pngRequest;
@@ skipping 17 matching lines @@
     // Simulate a successful revalidation.
     // The revalidated resource (oldResource) should now be in the cache, newResource
     // should have been sliently switched to point to the revalidated resource, and
     // we shouldn't hit any ASSERTs.
     ResourceResponse response;
     response.setHTTPStatusCode(304);
     newResource->responseReceived(response, nullptr);
     EXPECT_EQ(memoryCache()->resourceForURL(KURL(ParsedURLString, "data:text/html,")), oldResource.get());
     EXPECT_EQ(oldResource.get(), newResource.get());
     EXPECT_NE(newResource.get(), newResourcePointer);
+    memoryCache()->remove(newResource.get());
 }
 
 class DummyClient : public RawResourceClient {
 public:
     DummyClient() : m_called(false) {}
     ~DummyClient() override {}
 
     // ResourceClient implementation.
     virtual void notifyFinished(Resource* resource)
     {
@@ skipping 84 matching lines @@
 
     OwnPtr<DummyClient> dummyClient = adoptPtr(new DummyClient());
     OwnPtr<RemovingClient> removingClient = adoptPtr(new RemovingClient(dummyClient.get()));
     raw->addClient(dummyClient.get());
     raw->addClient(removingClient.get());
     testing::runPendingTasks();
     EXPECT_FALSE(raw->hasClients());
 }
 
 } // namespace blink