Replace RoundMicrosecondsTo* utility.

runtime/vm/scavenger.cc

 // Copyright (c) 2011, 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.
 
 #include "vm/scavenger.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 722 matching lines @@
 
 void Scavenger::PrintToJSONObject(JSONObject* object) {
   JSONObject space(object, "new");
   space.AddProperty("type", "@Scavenger");
   space.AddProperty("id", "heaps/new");
   space.AddProperty("name", "Scavenger");
   space.AddProperty("user_name", "new");
   space.AddProperty("collections", collections());
   space.AddProperty("used", UsedInWords() * kWordSize);
   space.AddProperty("capacity", CapacityInWords() * kWordSize);
-  space.AddProperty("time", RoundMicrosecondsToSeconds(gc_time_micros()));
+  space.AddProperty("time", MicrosecondsToSeconds(gc_time_micros()));
 }
 
 
 void Scavenger::AllocateExternal(intptr_t size) {
   ASSERT(size >= 0);
   external_size_ += size;
   intptr_t remaining = end_ - top_;
   end_ -= Utils::Minimum(remaining, size);
 }
 
 
 void Scavenger::FreeExternal(intptr_t size) {
   ASSERT(size >= 0);
   external_size_ -= size;
   ASSERT(external_size_ >= 0);
   end_ = Utils::Minimum(to_->end(), end_ + size);
 }
 
 }  // namespace dart