Add function for one-time stop at function entry

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 204 matching lines @@
  *
  * \return A handle to the True object if no error occurs.
  */
 DART_EXPORT Dart_Handle Dart_SetBreakpointAtLine(
                             Dart_Handle script_url,
                             Dart_Handle line_number,
                             Dart_Breakpoint* breakpoint);
 
 
 /**
- * Sets a breakpoint at the entry of the given function. If class_name
- * is the empty string, looks for a library function with the given
- * name.
+ * Sets a one-time breakpoint at the entry of the given function.
+ * If class_name is the empty string, looks for a library function
+ * with the given name.
  *
  * Requires there to be a current isolate.
  *
  * \breakpoint If non-null, will point to the breakpoint object
  *   if a breakpoint was successfully created.
  *
  * \return A handle to the True object if no error occurs.
  */
 DART_EXPORT Dart_Handle Dart_SetBreakpointAtEntry(
                             Dart_Handle library,
                             Dart_Handle class_name,
                             Dart_Handle function_name,
                             Dart_Breakpoint* breakpoint);
 
 
 /**
+ * Sets a breakpoint at the entry of the given function. If class_name
+ * is the empty string, looks for a library function with the given
+ * name.
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to the True object if no error occurs.
+ */
+DART_EXPORT Dart_Handle Dart_OneTimeBreakAtEntry(
+                            Dart_Handle library,
+                            Dart_Handle class_name,
+                            Dart_Handle function_name);
+
+
+/**
  * DEPRECATED -- use Dart_RemoveBreakpoint instead.
  *
  * Deletes the given \breakpoint.
  *
  * Requires there to be a current isolate.
  *
  * \return A handle to the True object if no error occurs.
  */
 DART_EXPORT Dart_Handle Dart_DeleteBreakpoint(
                             Dart_Breakpoint breakpoint);
@@ skipping 303 matching lines @@
 
 /**
 * Returns the isolate object corresponding to the isolate id.
 *
 * \return The Dart_Isolate object corresponding to the isolate id.
 * If the specified id is invalid NULL is returned.
 */
 DART_EXPORT Dart_Isolate Dart_GetIsolate(Dart_IsolateId isolate_id);
 
 #endif  // INCLUDE_DART_DEBUGGER_API_H_