Remove unused WEBKIT_DEPRECATED thread

chrome/browser/metrics/thread_watcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/metrics/thread_watcher.h"
 
 #include <math.h>  // ceil
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 45 matching lines @@
 }
 
 NOINLINE void ThreadUnresponsive_UI() {
   NullPointerCrash(__LINE__);
 }
 
 NOINLINE void ThreadUnresponsive_DB() {
   NullPointerCrash(__LINE__);
 }
 
-NOINLINE void ThreadUnresponsive_WEBKIT() {
-  NullPointerCrash(__LINE__);
-}
-
 NOINLINE void ThreadUnresponsive_FILE() {
   NullPointerCrash(__LINE__);
 }
 
 NOINLINE void ThreadUnresponsive_FILE_USER_BLOCKING() {
   NullPointerCrash(__LINE__);
 }
 
 NOINLINE void ThreadUnresponsive_PROCESS_LAUNCHER() {
   NullPointerCrash(__LINE__);
@@ skipping 11 matching lines @@
 MSVC_ENABLE_OPTIMIZE();
 
 void CrashBecauseThreadWasUnresponsive(BrowserThread::ID thread_id) {
   base::debug::Alias(&thread_id);
 
   switch (thread_id) {
     case BrowserThread::UI:
       return ThreadUnresponsive_UI();
     case BrowserThread::DB:
       return ThreadUnresponsive_DB();
-    case BrowserThread::WEBKIT_DEPRECATED:
-      return ThreadUnresponsive_WEBKIT();
     case BrowserThread::FILE:
       return ThreadUnresponsive_FILE();
     case BrowserThread::FILE_USER_BLOCKING:
       return ThreadUnresponsive_FILE_USER_BLOCKING();
     case BrowserThread::PROCESS_LAUNCHER:
       return ThreadUnresponsive_PROCESS_LAUNCHER();
     case BrowserThread::CACHE:
       return ThreadUnresponsive_CACHE();
     case BrowserThread::IO:
       return ThreadUnresponsive_IO();
@@ skipping 867 matching lines @@
 
 #if defined(OS_WIN)
   // On Windows XP, give twice the time for shutdown.
   if (base::win::GetVersion() <= base::win::VERSION_XP)
     actual_duration *= 2;
 #endif
 
   shutdown_watchdog_ = new ShutdownWatchDogThread(actual_duration);
   shutdown_watchdog_->Arm();
 }