Remove dead code from DartController

sky/engine/core/script/dart_controller.h

Index: sky/engine/core/script/dart_controller.h
diff --git a/sky/engine/core/script/dart_controller.h b/sky/engine/core/script/dart_controller.h
index 5c58e3726e88600418a1d566127c54b8d8a3d2e4..89661c520a5bdcf678c9e92ec267cf029a339a0c 100644
--- a/sky/engine/core/script/dart_controller.h
+++ b/sky/engine/core/script/dart_controller.h
@@ -19,7 +19,6 @@ class AbstractModule;
 class BuiltinSky;
 class DOMDartState;
 class DartLibraryProvider;
-class DartLibraryProviderWebView;
 class DartSnapshotLoader;
 class DartValue;
 class KURL;
@@ -32,9 +31,6 @@ class DartController {
 
   static void InitVM();
 
-  typedef base::Callback<void(RefPtr<AbstractModule>, RefPtr<DartValue>)>
-      LoadFinishedCallback;
-
   void RunFromLibrary(const String& name,
                       DartLibraryProvider* library_provider);
   void RunFromSnapshot(mojo::ScopedDataPipeConsumerHandle snapshot);
@@ -51,7 +47,6 @@ class DartController {
 
   OwnPtr<DOMDartState> dom_dart_state_;
   OwnPtr<BuiltinSky> builtin_sky_;
-  OwnPtr<DartLibraryProviderWebView> library_provider_;
   OwnPtr<DartSnapshotLoader> snapshot_loader_;
 
   base::WeakPtrFactory<DartController> weak_factory_;