[TTS] Fix non-enqueueable Utterance leak in TtsController

chrome/browser/speech/tts_controller_impl.cc

 // Copyright 2014 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/speech/tts_controller_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/float_util.h"
@@ skipping 120 matching lines @@
   // Clear any queued utterances too.
   ClearUtteranceQueue(false);  // Don't sent events.
 }
 
 void TtsControllerImpl::SpeakOrEnqueue(Utterance* utterance) {
   // If we're paused and we get an utterance that can't be queued,
   // flush the queue but stay in the paused state.
   if (paused_ && !utterance->can_enqueue()) {
     Stop();
     paused_ = true;
+    delete utterance;
     return;
   }
 
   if (paused_ || (IsSpeaking() && utterance->can_enqueue())) {
     utterance_queue_.push(utterance);
   } else {
     Stop();
     SpeakNow(utterance);
   }
 }
@@ skipping 303 matching lines @@
 }
 
 void TtsControllerImpl::SetTtsEngineDelegate(
     TtsEngineDelegate* delegate) {
   tts_engine_delegate_ = delegate;
 }
 
 TtsEngineDelegate* TtsControllerImpl::GetTtsEngineDelegate() {
   return tts_engine_delegate_;
 }