Port more String and HashMap usages

sky/engine/tonic/dart_library_loader.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 SKY_ENGINE_TONIC_DART_LIBRARY_LOADER_H_
 #define SKY_ENGINE_TONIC_DART_LIBRARY_LOADER_H_
 
+#include <string>
+#include <unordered_map>
 #include <vector>
+
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "dart/runtime/include/dart_api.h"
-#include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/HashSet.h"
 #include "sky/engine/wtf/OwnPtr.h"
-#include "sky/engine/wtf/text/WTFString.h"
 
 namespace blink {
 class DartDependency;
 class DartDependencyCatcher;
 class DartLibraryProvider;
 class DartState;
 
 // TODO(abarth): This class seems more complicated than it needs to be. Is
 // there some way of simplifying this system? For example, we have a bunch
 // of inner classes that could potentially be factored out in some other way.
 class DartLibraryLoader {
  public:
   explicit DartLibraryLoader(DartState* dart_state);
   ~DartLibraryLoader();
 
   // TODO(dart): This can be called both on the main thread from application
   // solates or from the handle watcher isolate thread.
   static Dart_Handle HandleLibraryTag(Dart_LibraryTag tag,
                                       Dart_Handle library,
                                       Dart_Handle url);
 
-  void LoadLibrary(const String& name);
+  void LoadLibrary(const std::string& name);
 
   void WaitForDependencies(const HashSet<DartDependency*>& dependencies,
                            const base::Closure& callback);
 
   void set_dependency_catcher(DartDependencyCatcher* dependency_catcher) {
     DCHECK(!dependency_catcher_ || !dependency_catcher);
     dependency_catcher_ = dependency_catcher;
   }
 
   DartState* dart_state() const { return dart_state_; }
@@ skipping 14 matching lines @@
 
   Dart_Handle Import(Dart_Handle library, Dart_Handle url);
   Dart_Handle Source(Dart_Handle library, Dart_Handle url);
   Dart_Handle CanonicalizeURL(Dart_Handle library, Dart_Handle url);
   void DidCompleteImportJob(ImportJob* job, const std::vector<uint8_t>& buffer);
   void DidCompleteSourceJob(SourceJob* job, const std::vector<uint8_t>& buffer);
   void DidFailJob(Job* job);
 
   DartState* dart_state_;
   DartLibraryProvider* library_provider_;
-  HashMap<String, Job*> pending_libraries_;
+  std::unordered_map<std::string, Job*> pending_libraries_;
   HashSet<OwnPtr<Job>> jobs_;
   HashSet<OwnPtr<DependencyWatcher>> dependency_watchers_;
   DartDependencyCatcher* dependency_catcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DartLibraryLoader);
 };
 
 }  // namespace blink
 
 #endif  // SKY_ENGINE_TONIC_DART_LIBRARY_LOADER_H_