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

Source/core/platform/graphics/FontCache.h

 /*
  * Copyright (C) 2006, 2008 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  *
  * 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. 
@@ skipping 13 matching lines @@
  * 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 FontCache_h
 #define FontCache_h
 
 #include <limits.h>
-#include <wtf/Forward.h>
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefPtr.h>
-#include <wtf/Vector.h>
-#include <wtf/text/WTFString.h>
-#include <wtf/unicode/Unicode.h>
+#include "wtf/Forward.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
+#include "wtf/Vector.h"
+#include "wtf/text/WTFString.h"
+#include "wtf/unicode/Unicode.h"
 
 #if OS(WINDOWS)
 #include <windows.h>
 #include <objidl.h>
 #include <mlang.h>
 #endif
 
 namespace WebCore {
 
 class Font;
@@ skipping 93 matching lines @@
 
 class FontCachePurgePreventer {
 public:
     FontCachePurgePreventer() { fontCache()->disablePurging(); }
     ~FontCachePurgePreventer() { fontCache()->enablePurging(); }
 };
 
 }
 
 #endif