Support merged Dart-JS callstacks

Source/bindings/dart/DartJsInterop.cpp

 /*
  * Copyright (C) 2013 Google Inc. 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
@@ skipping 59 matching lines @@
         }
         v8SetReturnValue(info, ret);
     }
 }
 
 static void functionInvocationCallback(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     DartScopes scopes(args.Holder());
     Dart_Handle handle = scopes.handle;
     DartDOMData* domData = DartDOMData::current();
+    // We need to call V8Scope to properly track the stack depth and timestamp
+    // for the transition between V8 and Dart.
+    V8Scope v8scope(domData);
     ASSERT(domData);
     ASSERT(DartUtilities::isFunction(domData, handle));
 
     Vector<Dart_Handle> dartFunctionArgs;
     ASSERT(args.Length() == 1 || args.Length() == 2);
     // If there is 1 argument, we assume it is a v8:Array or arguments, if
     // there are 2 arguments, the first argument is "this" and the second
     // argument is an array of arguments.
     if (args.Length() > 1) {
         dartFunctionArgs.append(JsInterop::toDart(args[0]));
@@ skipping 954 matching lines @@
 {
     for (intptr_t i = 0; nativeEntries[i].nativeFunction != 0; i++) {
         if (nf == nativeEntries[i].nativeFunction) {
             return reinterpret_cast<const uint8_t*>(nativeEntries[i].name);
         }
     }
     return 0;
 }
 
 }