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

runtime/vm/service.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/service.h"
 
 #include "include/dart_api.h"
 
 #include "vm/compiler.h"
 #include "vm/coverage.h"
@@ skipping 279 matching lines @@
     const String& url_str = String::Handle(Symbols::DartVMService().raw());
     library ^= Library::LookupLibrary(url_str);
     ASSERT(library.IsNull());
     // Setup library.
     library = Library::New(url_str);
     library.Register();
     const Script& script = Script::Handle(
       isolate, Script::New(url_str, source_str, RawScript::kLibraryTag));
     library.SetLoadInProgress();
     Dart_EnterScope();  // Need to enter scope for tag handler.
-    const Error& error = Error::Handle(isolate,
-                                       Compiler::Compile(library, script));
-    ASSERT(error.IsNull());
+    {
+      NativeToVmTimerScope timer(isolate);
+      const Error& error = Error::Handle(isolate,
+                                         Compiler::Compile(library, script));
+      ASSERT(error.IsNull());
+    }
     Dart_ExitScope();
     library.SetLoaded();
     // Install embedder default library tag handler again.
     isolate->set_library_tag_handler(default_handler_);
     default_handler_ = NULL;
     library.set_native_entry_resolver(VmServiceNativeResolver);
   }
   {
     // Boot the dart:vmservice library.
     Dart_EnterScope();
@@ skipping 995 matching lines @@
   while (current != NULL) {
     if (!strcmp(name, current->name())) {
       return current;
     }
     current = current->next();
   }
   return NULL;
 }
 
 }  // namespace dart