Fix debugger stack traces

runtime/vm/service.cc

 // Copyright (c) 2013, 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.
 
 #include "vm/debugger.h"
 #include "vm/heap_histogram.h"
 #include "vm/isolate.h"
 #include "vm/message.h"
 #include "vm/object.h"
 #include "vm/object_id_ring.h"
@@ skipping 149 matching lines @@
 
 static void HandleStackTrace(Isolate* isolate, JSONStream* js) {
   DebuggerStackTrace* stack = isolate->debugger()->StackTrace();
   js->OpenObject();
   js->PrintProperty("type", "StackTrace");
   js->OpenArray("members");
   intptr_t n_frames = stack->Length();
   String& url = String::Handle();
   String& function = String::Handle();
   for (int i = 0; i < n_frames; i++) {
-    ActivationFrame* frame = stack->ActivationFrameAt(i);
+    ActivationFrame* frame = stack->FrameAt(i);
     url ^= frame->SourceUrl();
     function ^= frame->function().UserVisibleName();
     js->OpenObject();
     js->PrintProperty("name", function.ToCString());
     js->PrintProperty("url", url.ToCString());
     js->PrintProperty("line", frame->LineNumber());
     js->PrintProperty("function", frame->function());
     js->PrintProperty("code", frame->code());
     js->CloseObject();
   }
@@ skipping 97 matching lines @@
   for (intptr_t i = 0; i < num_message_handlers; i++) {
     const ServiceMessageHandlerEntry& entry = __message_handlers[i];
     if (!strcmp(command, entry.command)) {
       return entry.handler;
     }
   }
   return HandleFallthrough;
 }
 
 }  // namespace dart