Factor DartLibraryProvider out of DartLoader

sky/engine/tonic/dart_dependency_catcher.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_CORE_SCRIPT_DEPENDENCY_CATCHER_H_
-#define SKY_ENGINE_CORE_SCRIPT_DEPENDENCY_CATCHER_H_
+#ifndef SKY_ENGINE_TONIC_DART_DEPENDENCY_CATCHER_H_
+#define SKY_ENGINE_TONIC_DART_DEPENDENCY_CATCHER_H_
 
 #include "base/macros.h"
 #include "sky/engine/wtf/HashSet.h"
 
 namespace blink {
-class DartLoader;
+class DartLibraryLoader;
 
 // A base class to represent a dependency.
-class DartDependency {
-};
+class DartDependency {};
 
 // To catch the dependencies for a library, put a DartDependencyCatcher on the
 // stack during the call to Dart_LoadLibrary.
 class DartDependencyCatcher {
  public:
-  explicit DartDependencyCatcher(DartLoader& loader);
+  explicit DartDependencyCatcher(DartLibraryLoader& loader);
   ~DartDependencyCatcher();
 
   void AddDependency(DartDependency* dependency);
   const HashSet<DartDependency*>& dependencies() const { return dependencies_; }
 
  private:
-  DartLoader& loader_;
+  DartLibraryLoader& loader_;
   HashSet<DartDependency*> dependencies_;
 
   DISALLOW_COPY_AND_ASSIGN(DartDependencyCatcher);
 };
 
 }  // namespace blink
 
-#endif  // SKY_ENGINE_CORE_SCRIPT_DEPENDENCY_CATCHER_H_
+#endif  // SKY_ENGINE_TONIC_DART_DEPENDENCY_CATCHER_H_