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

runtime/vm/runtime_entry.h

 // 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.
 
 #ifndef VM_RUNTIME_ENTRY_H_
 #define VM_RUNTIME_ENTRY_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/flags.h"
 #include "vm/native_arguments.h"
+#include "vm/timer_scope.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, trace_runtime_calls);
 
 typedef void (*RuntimeFunction)(NativeArguments arguments);
 
 
 // Class RuntimeEntry is used to encapsulate runtime functions, it includes
 // the entry point for the runtime function and the number of arguments expected
@@ skipping 32 matching lines @@
 
 // Helper macros for declaring and defining runtime entries.
 
 #define DEFINE_RUNTIME_ENTRY(name, argument_count)                             \
   extern void DRT_##name(NativeArguments arguments);                           \
   extern const RuntimeEntry k##name##RuntimeEntry(                             \
       "DRT_"#name, &DRT_##name, argument_count, false, false);                 \
   static void DRT_Helper##name(Isolate* isolate, NativeArguments arguments);   \
   void DRT_##name(NativeArguments arguments) {                                 \
     CHECK_STACK_ALIGNMENT;                                                     \
+    DartToVmTimerScope timer(arguments.isolate());                             \
     VERIFY_ON_TRANSITION;                                                      \
     ASSERT(arguments.ArgCount() == argument_count);                            \
     if (FLAG_trace_runtime_calls) OS::Print("Runtime call: %s\n", ""#name);    \
     {                                                                          \
       StackZone zone(arguments.isolate());                                     \
       HANDLESCOPE(arguments.isolate());                                        \
       DRT_Helper##name(arguments.isolate(), arguments);                        \
     }                                                                          \
     VERIFY_ON_TRANSITION;                                                      \
   }                                                                            \
@@ skipping 13 matching lines @@
 
 #define END_LEAF_RUNTIME_ENTRY }
 
 #define DECLARE_LEAF_RUNTIME_ENTRY(type, name, ...)                            \
   extern const RuntimeEntry k##name##RuntimeEntry;                             \
   extern "C" type DLRT_##name(__VA_ARGS__)
 
 }  // namespace dart
 
 #endif  // VM_RUNTIME_ENTRY_H_