Port more String and HashMap usages

sky/engine/core/script/dart_controller.cc

 // 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.
 
 #include "sky/engine/core/script/dart_controller.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 97 matching lines @@
 
 void DartController::RunFromLibrary(const String& name,
                                     DartLibraryProvider* library_provider) {
   DartState::Scope scope(dart_state());
   CreateEmptyRootLibraryIfNeeded();
 
   DartLibraryLoader& loader = dart_state()->library_loader();
   loader.set_library_provider(library_provider);
 
   DartDependencyCatcher dependency_catcher(loader);
-  loader.LoadLibrary(name);
+  loader.LoadLibrary(name.toUTF8());
   loader.WaitForDependencies(dependency_catcher.dependencies(),
                              base::Bind(&DartController::DidLoadMainLibrary,
                                         weak_factory_.GetWeakPtr(), name));
 }
 
 void DartController::CreateIsolateFor(PassOwnPtr<DOMDartState> state) {
   CHECK(kDartIsolateSnapshotBuffer);
   char* error = nullptr;
   dom_dart_state_ = state;
   Dart_Isolate isolate = Dart_CreateIsolate(
@@ skipping 24 matching lines @@
 }
 
 void DartController::InstallView(View* view) {
   DartIsolateScope isolate_scope(dart_state()->isolate());
   DartApiScope dart_api_scope;
 
   builtin_sky_->InstallView(view);
 }
 
 } // namespace blink