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

Source/core/platform/DateTimeChooser.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 14 matching lines @@
  * 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 DateTimeChooser_h
 #define DateTimeChooser_h
 
 #include "core/platform/graphics/IntRect.h"
-#include <wtf/RefCounted.h>
-#include <wtf/text/WTFString.h>
+#include "wtf/RefCounted.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 struct DateTimeChooserParameters {
     AtomicString type;
     IntRect anchorRectInRootView;
     // Locale name for which the chooser should be localized. This
     // might be an invalid name because it comes from HTML lang
     // attributes.
     AtomicString locale;
@@ skipping 12 matching lines @@
 // For pickers like color pickers and date pickers.
 class DateTimeChooser : public RefCounted<DateTimeChooser> {
 public:
     virtual ~DateTimeChooser() { }
 
     virtual void endChooser() = 0;
 };
 
 } // namespace WebCore
 #endif // DateTimeChooser_h