Remove unused debug API.

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6629 matching lines @@
 }
 
 
 TEST(ProcessDebugMessagesThreaded) {
   DebugLocalContext env;
   v8::Isolate* isolate = env->GetIsolate();
   v8::HandleScope scope(isolate);
 
   counting_message_handler_counter = 0;
 
-  v8::Debug::SetMessageHandler2(CountingMessageHandler);
+  v8::Debug::SetMessageHandler(CountingMessageHandler);
   send_command_thread_ = new SendCommandThread(isolate);
   send_command_thread_->Start();
 
   v8::Handle<v8::FunctionTemplate> start =
       v8::FunctionTemplate::New(isolate, StartSendingCommands);
   env->Global()->Set(v8_str("start"), start->GetFunction());
 
   CompileRun("start(); while (true) { }");
 
   CHECK_EQ(100, counting_message_handler_counter);
 
-  v8::Debug::SetMessageHandler2(NULL);
+  v8::Debug::SetMessageHandler(NULL);
   CheckDebuggerUnloaded();
 }
 
 
 struct BacktraceData {
   static int frame_counter;
   static void MessageHandler(const v8::Debug::Message& message) {
     char print_buffer[1000];
     v8::String::Value json(message.GetJSON());
     Utf16ToAscii(*json, json.length(), print_buffer, 1000);
@@ skipping 745 matching lines @@
   env->Global()->Set(v8_str("add_debug_break"), add_debug_break);
 
   CompileRun("(function loop() {"
              "  for (var j = 0; j < 1000; j++) {"
              "    for (var i = 0; i < 1000; i++) {"
              "      if (i == 999) add_debug_break();"
              "    }"
              "  }"
              "})()");
 }