[inspector] console.timeEnd formats ms in the same way as JS formats double

test/inspector/inspector-impl.h

Index: test/inspector/inspector-impl.h
diff --git a/test/inspector/inspector-impl.h b/test/inspector/inspector-impl.h
index f94bef159998b73d320aa8904223fddd0c735b16..e18f6d5e1a6f137dac0f878854450ff4e7150528 100644
--- a/test/inspector/inspector-impl.h
+++ b/test/inspector/inspector-impl.h
@@ -28,6 +28,8 @@ class InspectorClientImpl : public v8_inspector::V8InspectorClient {
   static v8_inspector::V8Inspector* InspectorFromContext(
       v8::Local<v8::Context> context);
 
+  void setCurrentTimeMSForTest(double time);
+
  private:
   // V8InspectorClient implementation.
   v8::Local<v8::Context> ensureDefaultContextInGroup(
@@ -54,6 +56,9 @@ class InspectorClientImpl : public v8_inspector::V8InspectorClient {
   TaskRunner* task_runner_;
   FrontendChannel* frontend_channel_;
 
+  bool current_time_set_for_test_ = false;
+  double current_time_ = 0.0;
+
   DISALLOW_COPY_AND_ASSIGN(InspectorClientImpl);
 };