Listen for tab close notifications and cancel active speech sessions.

chrome/browser/speech/speech_input_bubble.cc

Index: chrome/browser/speech/speech_input_bubble.cc
diff --git a/chrome/browser/speech/speech_input_bubble.cc b/chrome/browser/speech/speech_input_bubble.cc
index 655415fe4a6968bbd8122efc95582e1f2444a3c5..77619e9098cf0e397a50477ef54a3a8e0fbd15a2 100644
--- a/chrome/browser/speech/speech_input_bubble.cc
+++ b/chrome/browser/speech/speech_input_bubble.cc
@@ -32,9 +32,10 @@ SpeechInputBubble* SpeechInputBubble::Create(TabContents* tab_contents,
   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);