Listen for tab close notifications and cancel active speech sessions.

chrome/browser/speech/speech_input_bubble.cc

 // Copyright (c) 2010 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 "app/resource_bundle.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/speech/speech_input_bubble.h"
 #include "gfx/canvas_skia.h"
 #include "gfx/rect.h"
 #include "grit/generated_resources.h"
@@ skipping 14 matching lines @@
   if (factory_)
     return (*factory_)(tab_contents, delegate, element_rect);
 
   // Has the tab already closed before bubble create request was processed?
   if (!tab_contents)
     return NULL;
 
   return CreateNativeBubble(tab_contents, delegate, element_rect);
 }
 
-SpeechInputBubbleBase::SpeechInputBubbleBase()
+SpeechInputBubbleBase::SpeechInputBubbleBase(TabContents* tab_contents)
     : ALLOW_THIS_IN_INITIALIZER_LIST(task_factory_(this)),
-      display_mode_(DISPLAY_MODE_RECORDING) {
+      display_mode_(DISPLAY_MODE_RECORDING),
+      tab_contents_(tab_contents) {
   if (!mic_empty_) {  // Static variables.
     mic_empty_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
         IDR_SPEECH_INPUT_MIC_EMPTY);
     mic_full_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
         IDR_SPEECH_INPUT_MIC_FULL);
     mic_mask_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
         IDR_SPEECH_INPUT_MIC_MASK);
     spinner_ = ResourceBundle::GetSharedInstance().GetBitmapNamed(
         IDR_SPEECH_INPUT_SPINNER);
   }
@@ skipping 93 matching lines @@
   SkPaint multiply_paint;
   multiply_paint.setXfermode(SkXfermode::Create(SkXfermode::kMultiply_Mode));
   buffer_canvas.drawBitmap(*mic_mask_, 0, clip_top, &multiply_paint);
 
   // Draw the empty volume image first and the current volume image on top.
   canvas.drawBitmap(*mic_empty_, 0, 0);
   canvas.drawBitmap(*buffer_image_.get(), 0, 0);
 
   SetImage(*mic_image_.get());
 }