Stop running pub get at gclient sync time and fix build bugs

tonic/dart_library_provider.h

 // Copyright 2015 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 TONIC_DART_LIBRARY_PROVIDER_H_
 #define TONIC_DART_LIBRARY_PROVIDER_H_
 
 #include <string>
 
 #include "base/callback.h"
-#include "dart/runtime/include/dart_api.h"
 #include "mojo/public/cpp/system/data_pipe.h"
+#include "mojo/public/third_party/dart/runtime/include/dart_api.h"
 
 namespace tonic {
 
 typedef base::Callback<void(mojo::ScopedDataPipeConsumerHandle)>
     DataPipeConsumerCallback;
 
 class DartLibraryProvider {
  public:
   virtual void GetLibraryAsStream(const std::string& name,
                                   DataPipeConsumerCallback callback) = 0;
 
   virtual Dart_Handle CanonicalizeURL(Dart_Handle library, Dart_Handle url) = 0;
 
   virtual ~DartLibraryProvider();
 };
 
 }  // namespace tonic
 
 #endif  // TONIC_DART_LIBRARY_PROVIDER_H_