Dart: Moves |native| methods to patch files.

sky/engine/bindings/builtin.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_BINDINGS_BUILTIN_H_
 #define SKY_ENGINE_BINDINGS_BUILTIN_H_
 
 #include "base/macros.h"
 #include "dart/runtime/include/dart_api.h"
 
 namespace blink {
 
 class Builtin {
  public:
   // Note: Changes to this enum should be accompanied with changes to
   // the builtin_libraries_ array in builtin.cc.
   enum BuiltinLibraryId {
     kBuiltinLibrary,
     kSkyLibrary,
     kMojoBindingsLibrary,
     kMojoCoreLibrary,
     kInvalidLibrary,
   };
 
-  static void SetNativeResolver(BuiltinLibraryId id);
-  static Dart_Handle LoadAndCheckLibrary(BuiltinLibraryId id);
+  // Return the library specified in 'id'.
+  static Dart_Handle GetLibrary(BuiltinLibraryId id);
+
+  // Prepare the library specified in 'id'. Preparation includes:
+  // 1) Setting the native resolver (if any).
+  // 2) Applying patch files (if any).
+  // NOTE: This should only be called once for a library per isolate.
+  static void PrepareLibrary(BuiltinLibraryId id);
 
  private:
+  static int FindResource(const char* path, const uint8_t** resource);
+  static Dart_Handle GetStringResource(const char* resource_name);
+  static void LoadPatchFiles(Dart_Handle library,
+                             const char* patch_uri,
+                             const char** patch_files);
   DISALLOW_IMPLICIT_CONSTRUCTORS(Builtin);
 };
 
 }  // namespace blink
 
 #endif  // SKY_ENGINE_BINDINGS_BUILTIN_H_