Add more timing information in the VM to track time spent is dart code Vs native code.

runtime/vm/dart.cc

 // 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.
 
 #include "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
@@ skipping 173 matching lines @@
 Isolate* Dart::CreateIsolate(const char* name_prefix) {
   // Create a new isolate.
   Isolate* isolate = Isolate::Init(name_prefix);
   ASSERT(isolate != NULL);
   return isolate;
 }
 
 
 RawError* Dart::InitializeIsolate(const uint8_t* snapshot_buffer, void* data) {
   // Initialize the new isolate.
-  TIMERSCOPE(time_isolate_initialization);
   Isolate* isolate = Isolate::Current();
+  TIMERSCOPE(isolate, time_isolate_initialization);
   ASSERT(isolate != NULL);
   StackZone zone(isolate);
   HandleScope handle_scope(isolate);
   Heap::Init(isolate);
   ObjectIdRing::Init(isolate);
   ObjectStore::Init(isolate);
 
   if (snapshot_buffer == NULL) {
     const Error& error = Error::Handle(Object::Init(isolate));
     if (!error.IsNull()) {
@@ skipping 64 matching lines @@
   return predefined_handles_->handles_.AllocateScopedHandle();
 }
 
 
 bool Dart::IsReadOnlyHandle(uword address) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 }  // namespace dart