Introduce VM API for the patching mechanism.

runtime/include/dart_api.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 2685 matching lines @@
  * \param url A url identifying the origin of the source
  * \param source A string of Dart source
  *
  * \return A valid handle if no error occurs during the operation.
  */
 DART_EXPORT Dart_Handle Dart_LoadSource(Dart_Handle library,
                                         Dart_Handle url,
                                         Dart_Handle source);
 // TODO(turnidge): Rename to Dart_LibraryLoadSource?
 
+
+/**
+ * Loads a patch source string into a library.
+ *
+ * \param library A library
+ * \param url A url identifying the origin of the patch source
+ * \param source A string of Dart patch source
+ */
+DART_EXPORT Dart_Handle Dart_LoadPatch(Dart_Handle library,
+                                       Dart_Handle url,
+                                       Dart_Handle patch_source);
+
 /**
  * Sets the callback used to resolve native functions for a library.
  *
  * \param library A library.
  * \param resolver A native entry resolver.
  *
  * \return A valid handle if the native resolver was set successfully.
  */
 DART_EXPORT Dart_Handle Dart_SetNativeResolver(
     Dart_Handle library,
@@ skipping 40 matching lines @@
  *
  * \param object An object.
  * \param peer A value to store in the peer field.
  *
  * \return Returns an error if 'object' is a subtype of Null, num, or
  *   bool.
  */
 DART_EXPORT Dart_Handle Dart_SetPeer(Dart_Handle object, void* peer);
 
 #endif  // INCLUDE_DART_API_H_