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

Source/core/platform/mediastream/MediaConstraints.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:
  *
  * 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
@@ 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 MediaConstraints_h
 #define MediaConstraints_h
 
-#include <wtf/RefCounted.h>
-#include <wtf/text/WTFString.h>
+#include "wtf/RefCounted.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 struct MediaConstraint {
     MediaConstraint(String name, String value)
         : m_name(name)
         , m_value(value)
     {
     }
 
@@ skipping 11 matching lines @@
     virtual bool getMandatoryConstraintValue(const String& name, String& value) const = 0;
     virtual bool getOptionalConstraintValue(const String& name, String& value) const = 0;
 
 protected:
     MediaConstraints() { }
 };
 
 } // namespace WebCore
 
 #endif // MediaConstraints_h