Convert DCHECK validating that |request_id| was found to a CHECK in SpeechRecognitionDispatcher.

content/renderer/speech_recognition_dispatcher.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 "content/renderer/speech_recognition_dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/common/speech_recognition_messages.h"
 #include "content/renderer/render_view_impl.h"
@@ skipping 295 matching lines @@
 
 void SpeechRecognitionDispatcher::ResetAudioSink() {
 #if defined(ENABLE_WEBRTC)
   speech_audio_sink_.reset();
 #endif
 }
 
 const WebSpeechRecognitionHandle& SpeechRecognitionDispatcher::GetHandleFromID(
     int request_id) {
   HandleMap::iterator iter = handle_map_.find(request_id);
-  DCHECK(iter != handle_map_.end());
+  CHECK(iter != handle_map_.end());
   return iter->second;
 }
 
 }  // namespace content