Update Dart dependency and patch dart_controller to account for non-backwards compatible API update

mojo/dart/embedder/dart_controller.h

 // Copyright 2014 The Chromium 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 MOJO_DART_EMBEDDER_DART_CONTROLLER_H_
 #define MOJO_DART_EMBEDDER_DART_CONTROLLER_H_
 
 #include "dart/runtime/include/dart_api.h"
 #include "mojo/dart/embedder/isolate_data.h"
 #include "mojo/public/c/system/types.h"
@@ skipping 76 matching lines @@
 
   // Start the handle watcher isolate.
   static void StartHandleWatcherIsolate();
   // Stop the handle watcher isolate.
   static void StopHandleWatcherIsolate();
 
   // Dart API callback(s).
   static Dart_Isolate IsolateCreateCallback(const char* script_uri,
                                             const char* main,
                                             const char* package_root,
+                                            Dart_IsolateFlags* flags,
                                             void* callback_data,
                                             char** error);
   static void IsolateShutdownCallback(void* callback_data);
   static void UnhandledExceptionCallback(Dart_Handle error);
 
   // Dart API callback helper(s).
   static Dart_Isolate CreateIsolateHelper(void* dart_app,
                                           bool strict_compilation,
                                           IsolateCallbacks callbacks,
                                           const std::string& script,
                                           const std::string& script_uri,
                                           const std::string& package_root,
                                           char** error);
 
   static void InitVmIfNeeded(Dart_EntropySource entropy,
                              const char** arguments,
                              int arguments_count);
   static bool initialized_;
   static bool strict_compilation_;
   static bool service_isolate_running_;
   static DartControllerServiceConnector* service_connector_;
 };
 
 }  // namespace dart
 }  // namespace mojo
 
 #endif  // MOJO_DART_EMBEDDER_DART_CONTROLLER_H_