[counters] Making counter properly reentrant.

src/vm-state.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_VM_STATE_H_
 #define V8_VM_STATE_H_
 
 #include "src/allocation.h"
+#include "src/counters.h"
 #include "src/isolate.h"
 
 namespace v8 {
 namespace internal {
 
 // Logging and profiling.  A StateTag represents a possible state of
 // the VM. The logger maintains a stack of these. Creating a VMState
 // object enters a state by pushing on the stack, and destroying a
 // VMState object leaves a state by popping the current state from the
 // stack.
@@ skipping 22 matching lines @@
     return &callback_;
 #endif
   }
   ExternalCallbackScope* previous() { return previous_scope_; }
   inline Address scope_address();
 
  private:
   Isolate* isolate_;
   Address callback_;
   ExternalCallbackScope* previous_scope_;
+  RuntimeCallTimer timer_;
 #ifdef USE_SIMULATOR
   Address scope_address_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 
 #endif  // V8_VM_STATE_H_