Move the time conversion code to the PPAPI shared_impl directory and use it in

ppapi/shared_impl/time_conversion.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WEBKIT_PLUGINS_PPAPI_TIME_CONVERSION_H_
-#define WEBKIT_PLUGINS_PPAPI_TIME_CONVERSION_H_
+#ifndef PPAPI_SHARED_IMPL_TIME_CONVERSION_H_
+#define PPAPI_SHARED_IMPL_TIME_CONVERSION_H_
 
 #include "base/time.h"
 #include "ppapi/c/pp_time.h"
 
-namespace webkit {
 namespace ppapi {
 
 PP_Time TimeToPPTime(base::Time t);
 base::Time PPTimeToTime(PP_Time t);
 
 PP_TimeTicks TimeTicksToPPTimeTicks(base::TimeTicks t);
 
 // Converts between WebKit event times and time ticks. WebKit event times are
 // currently expressed in terms of wall clock time. This function does the
 // proper mapping to time ticks, assuming the wall clock time doesn't change
 // (which isn't necessarily the case).
 PP_TimeTicks EventTimeToPPTimeTicks(double event_time);
 double PPTimeTicksToEventTime(PP_TimeTicks t);
 
 }  // namespace ppapi
-}  // namespace webkit
 
-#endif  // WEBKIT_PLUGINS_PPAPI_TIME_CONVERSION_H_
+#endif  // PPAPI_SHARED_IMPL_TIME_CONVERSION_H_