Let TRACE_EVENT_XXX_WITH_TIMESTAMP accept TimeTicks instead of int64_t

third_party/WebKit/Source/platform/TraceEvent.h

 // Copyright 2016 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 TraceEvent_h
 #define TraceEvent_h
 
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "wtf/text/CString.h"
 
 namespace WTF {
 
 // CString version of SetTraceValue so that trace arguments can be strings.
 static inline void SetTraceValue(const CString& arg, unsigned char* type, unsigned long long* value)
 {
     trace_event_internal::TraceValueUnion typeValue;
     typeValue.as_string = arg.data();
     *type = TRACE_VALUE_TYPE_COPY_STRING;
     *value = typeValue.as_uint;
 }
 
 } // namespace WTF
 
 namespace blink {
 namespace TraceEvent {
 
 using base::trace_event::TraceScopedTrackableObject;
 
-inline int64_t toTraceTimestamp(double seconds)
+inline base::TimeTicks toTraceTimestamp(double seconds)
 {
-    return (base::TimeTicks() + base::TimeDelta::FromSecondsD(seconds)).ToInternalValue();
+    return base::TimeTicks() + base::TimeDelta::FromSecondsD(seconds);
 }
 
+// This is to avoid error of passing a chromium time internal value.
+void toTraceTimestamp(int64_t);
+
 } // namespace TraceEvent
 } // namespace blink
 
 #endif