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

Source/core/platform/MemoryUsageSupport.h

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * 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 MemoryUsageSupport_h
 #define MemoryUsageSupport_h
 
-#include <wtf/Forward.h>
-#include <wtf/PassOwnPtr.h>
-#include <wtf/text/WTFString.h>
+#include "wtf/Forward.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class MemoryUsageSupport {
 public:
     // Returns the current space allocated for the pagefile, in MB.
     // That is committed size for Windows and virtual memory size for POSIX.
     static int memoryUsageMB();
 
     // Same as above, but always returns actual value, without any
@@ skipping 13 matching lines @@
     };
 
     // Requests private and shared usage, in bytes. Private bytes is the amount of
     // memory currently allocated to this process that cannot be shared.
     static void requestProcessMemorySizes(PassOwnPtr<ProcessMemorySizesCallback> requestCallback);
 };
 
 } // namespace WebCore
 
 #endif // MemoryUsageSupport_h