Multi-tab: Adding new Notification when tab selection changes.

chrome/browser/tabs/tab_strip_model_observer.h

Index: chrome/browser/tabs/tab_strip_model_observer.h
diff --git a/chrome/browser/tabs/tab_strip_model_observer.h b/chrome/browser/tabs/tab_strip_model_observer.h
index 290d7700c87e506128313b0009e96ecee1c71663..14595484630af1b2aedfb0d0b5b6559e57fb930f 100644
--- a/chrome/browser/tabs/tab_strip_model_observer.h
+++ b/chrome/browser/tabs/tab_strip_model_observer.h
@@ -8,6 +8,7 @@
 
 class TabContentsWrapper;
 class TabStripModel;
+class TabStripSelectionModel;
 
 ////////////////////////////////////////////////////////////////////////////////
 //
@@ -79,6 +80,9 @@ class TabStripModelObserver {
                                 int index,
                                 bool user_gesture);
 
+  // Sent when the selection changes.

[sky, 2011/06/02 20:27:58]

Document what model contains.

[dpapad, 2011/06/02 23:29:50]

Done.

+  virtual void TabSelectionChanged(const TabStripSelectionModel& model);
+
   // The specified TabContents at |from_index| was moved to |to_index|.
   virtual void TabMoved(TabContentsWrapper* contents,
                         int from_index,