Add a command line option to generate source code for a script

runtime/include/dart_debugger_api.h

 // Copyright (c) 2011, 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_DEBUGGER_API_H_
 #define INCLUDE_DART_DEBUGGER_API_H_
 
 #include "include/dart_api.h"
 
 typedef struct _Dart_Breakpoint* Dart_Breakpoint;
@@ skipping 140 matching lines @@
  *
  * \return A handle to string containing the source text if no error
  * occurs.
  */
 DART_EXPORT Dart_Handle Dart_ScriptGetSource(
                             intptr_t library_id,
                             Dart_Handle script_url_in);
 
 
 /**
+ * Returns a string containing a generated source code of the given script
+ * in the given library. This is essentially used to pretty print dart code
+ * generated from any tool (e.g: dart2dart).
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to string containing the source text if no error
+ * occurs.
+ */
+DART_EXPORT Dart_Handle Dart_GenerateScriptSource(Dart_Handle library_url_in,
+                                                  Dart_Handle script_url_in);
+
+
+/**
  * Sets a breakpoint at line \line_number in \script_url, or the closest
  * following line (within the same function) where a breakpoint can be set.
  *
  * Requires there to be a current isolate.
  *
  * \return A handle containing the breakpoint id, which is an integer
  * value, or an error object if a breakpoint could not be set.
  */
 DART_EXPORT Dart_Handle Dart_SetBreakpoint(
                             Dart_Handle script_url,
@@ skipping 425 matching lines @@
  * \param request A REST-like string, which uses '/' to separate
  *     parameters. The first parameter is always the status type.
  *
  * \return The requested status as a JSON formatted string, with the
  *     contents defined by the status plug-in. The caller is responsible
  *     for freeing this string.
  */
 DART_EXPORT char* Dart_GetVmStatus(const char* request);
 
 #endif  // INCLUDE_DART_DEBUGGER_API_H_