Cleanup namespace usage in public/web/Web[A-M]*.h.

public/web/WebDateTimeSuggestion.h

 /*
  * Copyright (C) 2013 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * 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 WebDateTimeSuggestion_h
 #define WebDateTimeSuggestion_h
 
 #include "public/platform/WebString.h"
 
-#if BLINK_IMPLEMENTATION
-namespace blink { struct DateTimeSuggestion; }
-#endif
+namespace blink {
 
-namespace blink {
+struct DateTimeSuggestion;
 
 struct WebDateTimeSuggestion {
     double value;
     WebString localizedValue;
     WebString label;
 
     WebDateTimeSuggestion() { }
 
 #if BLINK_IMPLEMENTATION
-    WebDateTimeSuggestion(const blink::DateTimeSuggestion&);
-    WebDateTimeSuggestion& operator=(const blink::DateTimeSuggestion&);
+    WebDateTimeSuggestion(const DateTimeSuggestion&);
+    WebDateTimeSuggestion& operator=(const DateTimeSuggestion&);
 #endif
 };
 
 } // namespace blink
 
 #endif