Revert 22380 to investigate windows build break.

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 628 matching lines @@
  *
  * This function should be used to dispose of native resources that
  * are allocated to an isolate in order to avoid leaks.
  *
  * \param callback_data The same callback data which was passed to the
  *   isolate when it was created.
  *
  */
 typedef void (*Dart_IsolateShutdownCallback)(void* callback_data);
 
-/**
- * Callbacks provided by the embedder for file operations. If the
- * embedder does not allow file operations these callbacks can be
- * NULL.
- *
- * Dart_FileOpenCallback - opens a file for reading or writing.
- * \param name The name of the file to open.
- * \param write A boolean variable which indicates if the file is to
- *   opened for writing. If there is an existing file it needs to truncated.
- *
- * Dart_FileReadCallback - Read contents of file.
- * \param data Buffer allocated in the callback into which the contents
- *   of the file are read into. It is the responsibility of the caller to
- *   free this buffer.
- * \param file_length A variable into which the length of the file is returned.
- *   In the case of an error this value would be -1.
- * \param stream Handle to the opened file.
- *
- * Dart_FileWriteCallback - Write data into file.
- * \param data Buffer which needs to be written into the file.
- * \param length Length of the buffer.
- * \param stream Handle to the opened file.
- *
- * Dart_FileCloseCallback - Closes the opened file.
- * \param stream Handle to the opened file.
- *
- */
-typedef void* (*Dart_FileOpenCallback)(const char* name, bool write);
-
-typedef void (*Dart_FileReadCallback)(const uint8_t** data,
-                                      intptr_t* file_length,
-                                      void* stream);
+typedef void* (*Dart_FileOpenCallback)(const char* name);
 
 typedef void (*Dart_FileWriteCallback)(const void* data,
                                        intptr_t length,
                                        void* stream);
 
 typedef void (*Dart_FileCloseCallback)(void* stream);
 
 
 /**
  * Initializes the VM.
  *
  * \param create A function to be called during isolate creation.
  *   See Dart_IsolateCreateCallback.
  * \param interrupt A function to be called when an isolate is interrupted.
  *   See Dart_IsolateInterruptCallback.
  * \param unhandled_exception A function to be called if an isolate has an
  *   unhandled exception.  Set Dart_IsolateUnhandledExceptionCallback.
  * \param shutdown A function to be called when an isolate is shutdown.
  *   See Dart_IsolateShutdownCallback.
  *
  * \return True if initialization is successful.
  */
 DART_EXPORT bool Dart_Initialize(
     Dart_IsolateCreateCallback create,
     Dart_IsolateInterruptCallback interrupt,
     Dart_IsolateUnhandledExceptionCallback unhandled_exception,
     Dart_IsolateShutdownCallback shutdown,
     Dart_FileOpenCallback file_open,
-    Dart_FileReadCallback file_read,
     Dart_FileWriteCallback file_write,
     Dart_FileCloseCallback file_close);
 
 /**
  * Sets command line flags. Should be called before Dart_Initialize.
  *
  * \param argc The length of the arguments array.
  * \param argv An array of arguments.
  *
  * \return True if VM flags set successfully.
@@ skipping 1915 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_