Have uses of MockImageResourceClient leak less.

Source/core/fetch/RawResourceTest.cpp

Index: Source/core/fetch/RawResourceTest.cpp
diff --git a/Source/core/fetch/RawResourceTest.cpp b/Source/core/fetch/RawResourceTest.cpp
index 47b63e60edaf2a5e9f2528aceab5145ce8a9b7b3..2b0a4801469f83139dadab5eee8d11da6dc99169 100644
--- a/Source/core/fetch/RawResourceTest.cpp
+++ b/Source/core/fetch/RawResourceTest.cpp
@@ -43,6 +43,8 @@
 #include "public/platform/WebURLResponse.h"
 #include "public/platform/WebUnitTestSupport.h"
 
+#include <gtest/gtest.h>
+
 namespace blink {
 
 TEST(RawResourceTest, DontIgnoreAcceptForCacheReuse)
@@ -80,6 +82,7 @@ TEST(RawResourceTest, RevalidationSucceeded)
     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 {