Make timeline use the same clock source as mojo's tracing infrastructure

runtime/vm/json_stream.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_JSON_STREAM_H_
 #define VM_JSON_STREAM_H_
 
 #include "include/dart_api.h"  // for Dart_Port
 #include "platform/json.h"
 #include "vm/allocation.h"
@@ skipping 105 matching lines @@
   void OpenObject(const char* property_name = NULL);
   void CloseObject();
 
   void OpenArray(const char* property_name = NULL);
   void CloseArray();
 
   void PrintValueBool(bool b);
   void PrintValue(intptr_t i);
   void PrintValue64(int64_t i);
   void PrintValueTimeMillis(int64_t millis);
+  void PrintValueTimeMicros(int64_t micros);
   void PrintValue(double d);
   void PrintValueBase64(const uint8_t* bytes, intptr_t length);
   void PrintValue(const char* s);
   void PrintValue(const char* s, intptr_t len);
   void PrintValueNoEscape(const char* s);
   void PrintfValue(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
   void PrintValue(const Object& o, bool ref = true);
   void PrintValue(Breakpoint* bpt);
   void PrintValue(const ServiceEvent* event);
   void PrintValue(Metric* metric);
   void PrintValue(MessageQueue* queue);
   void PrintValue(Isolate* isolate, bool ref = true);
   bool PrintValueStr(const String& s, intptr_t limit);
   void PrintValue(TimelineEvent* timeline_event);
 
   void PrintServiceId(const Object& o);
   void PrintPropertyBool(const char* name, bool b);
   void PrintProperty(const char* name, intptr_t i);
   void PrintProperty64(const char* name, int64_t i);
   void PrintPropertyTimeMillis(const char* name, int64_t millis);
+  void PrintPropertyTimeMicros(const char* name, int64_t micros);
   void PrintProperty(const char* name, double d);
   void PrintPropertyBase64(const char* name,
                            const uint8_t* bytes,
                            intptr_t length);
   void PrintProperty(const char* name, const char* s);
   bool PrintPropertyStr(const char* name, const String& s, intptr_t limit);
   void PrintPropertyNoEscape(const char* name, const char* s);
   void PrintfProperty(const char* name, const char* format, ...)
   PRINTF_ATTRIBUTE(3, 4);
   void PrintProperty(const char* name, const Object& o, bool ref = true);
@@ skipping 65 matching lines @@
   }
   void AddProperty(const char* name, intptr_t i) const {
     stream_->PrintProperty(name, i);
   }
   void AddProperty64(const char* name, int64_t i) const {
     stream_->PrintProperty64(name, i);
   }
   void AddPropertyTimeMillis(const char* name, int64_t millis) const {
     stream_->PrintPropertyTimeMillis(name, millis);
   }
+  void AddPropertyTimeMicros(const char* name, int64_t micros) const {
+    stream_->PrintPropertyTimeMicros(name, micros);
+  }
   void AddProperty(const char* name, double d) const {
     stream_->PrintProperty(name, d);
   }
   void AddPropertyBase64(const char* name,
                          const uint8_t* bytes,
                          intptr_t length) const {
     stream_->PrintPropertyBase64(name, bytes, length);
   }
   void AddProperty(const char* name, const char* s) const {
     stream_->PrintProperty(name, s);
@@ skipping 54 matching lines @@
   ~JSONArray() {
     stream_->CloseArray();
   }
 
   void AddValue(bool b) const { stream_->PrintValueBool(b); }
   void AddValue(intptr_t i) const { stream_->PrintValue(i); }
   void AddValue64(int64_t i) const { stream_->PrintValue64(i); }
   void AddValueTimeMillis(int64_t millis) const {
     stream_->PrintValueTimeMillis(millis);
   }
+  void AddValueTimeMicros(int64_t micros) const {
+    stream_->PrintValueTimeMicros(micros);
+  }
   void AddValue(double d) const { stream_->PrintValue(d); }
   void AddValue(const char* s) const { stream_->PrintValue(s); }
   void AddValue(const Object& obj, bool ref = true) const {
     stream_->PrintValue(obj, ref);
   }
   void AddValue(Isolate* isolate, bool ref = true) const {
     stream_->PrintValue(isolate, ref);
   }
   void AddValue(Breakpoint* bpt) const {
     stream_->PrintValue(bpt);
@@ skipping 17 matching lines @@
 
   friend class JSONObject;
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(JSONArray);
 };
 
 }  // namespace dart
 
 #endif  // VM_JSON_STREAM_H_