Clean up VMState a little bit.

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 8876 matching lines @@
                                       Handle<Context> context) {
   ASSERT(context->allow_code_gen_from_strings()->IsFalse());
   // Check with callback if set.
   AllowCodeGenerationFromStringsCallback callback =
       isolate->allow_code_gen_callback();
   if (callback == NULL) {
     // No callback set and code generation disallowed.
     return false;
   } else {
     // Callback set. Let it decide if code generation is allowed.
-    VMState state(isolate, EXTERNAL);
+    VMState<EXTERNAL> state(isolate);
     return callback(v8::Utils::ToLocal(context));
   }
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileString) {
   HandleScope scope(isolate);
   ASSERT_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
   CONVERT_BOOLEAN_ARG_CHECKED(function_literal_only, 1);
@@ skipping 4383 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal