Listen for tab close notifications and cancel active speech sessions.

chrome/browser/speech/speech_input_bubble_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "chrome/browser/speech/speech_input_bubble.h"
 
 #import "base/scoped_nsobject.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
@@ skipping 12 matching lines @@
                         Delegate* delegate,
                         const gfx::Rect& element_rect);
   virtual ~SpeechInputBubbleImpl();
   virtual void Show();
   virtual void Hide();
   virtual void UpdateLayout();
   virtual void SetImage(const SkBitmap& image);
 
  private:
   scoped_nsobject<SpeechInputWindowController> window_;
-  TabContents* tab_contents_;
   Delegate* delegate_;
   gfx::Rect element_rect_;
 };
 
 SpeechInputBubbleImpl::SpeechInputBubbleImpl(TabContents* tab_contents,
                                              Delegate* delegate,
                                              const gfx::Rect& element_rect)
-    : tab_contents_(tab_contents),
+    : SpeechInputBubbleBase(tab_contents),
       delegate_(delegate),
       element_rect_(element_rect) {
 }
 
 SpeechInputBubbleImpl::~SpeechInputBubbleImpl() {
   if (window_.get())
     [window_.get() close];
 }
 
 void SpeechInputBubbleImpl::SetImage(const SkBitmap& image) {
   if (window_.get())
     [window_.get() setImage:gfx::SkBitmapToNSImage(image)];
 }
 
 void SpeechInputBubbleImpl::Show() {
   if (window_.get()) {
     [window_.get() show];
     return;
   }
 
   // Find the screen coordinates for the given tab and position the bubble's
   // arrow anchor point inside that to point at the bottom-left of the html
   // input element rect.
-  gfx::NativeView view = tab_contents_->view()->GetNativeView();
+  gfx::NativeView view = tab_contents()->view()->GetNativeView();
   NSRect tab_bounds = [view bounds];
   NSPoint anchor = NSMakePoint(
       tab_bounds.origin.x + element_rect_.x() + kBubbleTargetOffsetX,
       tab_bounds.origin.y + tab_bounds.size.height - element_rect_.y() -
       element_rect_.height());
   anchor = [view convertPoint:anchor toView:nil];
   anchor = [[view window] convertBaseToScreen:anchor];
 
   window_.reset([[SpeechInputWindowController alloc]
-      initWithParentWindow:tab_contents_->view()->GetTopLevelNativeWindow()
+      initWithParentWindow:tab_contents()->view()->GetTopLevelNativeWindow()
                   delegate:delegate_
                 anchoredAt:anchor]);
 
   UpdateLayout();
 }
 
 void SpeechInputBubbleImpl::Hide() {
   if (!window_.get())
     return;
 
@@ skipping 11 matching lines @@
 
 }  // namespace
 
 SpeechInputBubble* SpeechInputBubble::CreateNativeBubble(
     TabContents* tab_contents,
     Delegate* delegate,
     const gfx::Rect& element_rect) {
   return new SpeechInputBubbleImpl(tab_contents, delegate, element_rect);
 }