Make PP_TimeTicks actually be a tick counter rather than be the same as the

webkit/plugins/ppapi/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_
+
+#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_