Use a autorelease pool for the test webkit platform support class

content/test/test_webkit_platform_support.cc

Index: content/test/test_webkit_platform_support.cc
diff --git a/content/test/test_webkit_platform_support.cc b/content/test/test_webkit_platform_support.cc
index a55ebf676bb5e86a8ff3a42533654154bdd75fab..7d21a429693123ce63504c087f52906449847c99 100644
--- a/content/test/test_webkit_platform_support.cc
+++ b/content/test/test_webkit_platform_support.cc
@@ -35,11 +35,16 @@
 
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
+#include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 namespace content {
 
 TestWebKitPlatformSupport::TestWebKitPlatformSupport() {
+#if defined(OS_MACOSX)
+  base::mac::ScopedNSAutoreleasePool autorelease_pool;
+#endif
+
   url_loader_factory_.reset(new WebURLLoaderMockFactory());
   mock_clipboard_.reset(new MockWebClipboardImpl());