core: Include wtf files using "wtf/foo.h" form.

Source/core/testing/MallocStatistics.h

 /*
  * Copyright (C) 2012 SoftAtHome. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MallocStatistics_h
 #define MallocStatistics_h
 
-#include <wtf/FastMalloc.h>
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
+#include "wtf/FastMalloc.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class MallocStatistics : public RefCounted<MallocStatistics> {
 public:
     static PassRefPtr<MallocStatistics> create() { return adoptRef(new MallocStatistics()); }
 
     size_t reservedVMBytes() const { return m_stats.reservedVMBytes; }
     size_t committedVMBytes() const { return m_stats.committedVMBytes; }
     size_t freeListBytes() const { return m_stats.freeListBytes; }
 
 private:
     MallocStatistics()
     {
         m_stats = WTF::fastMallocStatistics();
     }
 
     WTF::FastMallocStatistics m_stats;
 };
 
 } // namespace WebCore
 
 #endif