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

chrome/browser/tabs/tab_strip_model_observer.cc

Index: chrome/browser/tabs/tab_strip_model_observer.cc
diff --git a/chrome/browser/tabs/tab_strip_model_observer.cc b/chrome/browser/tabs/tab_strip_model_observer.cc
index cf47a0f8dffad55e3aba993f1a02484da8b9cb9e..81759dce42d3114ddcbee9638400c998bb4cfd8f 100644
--- a/chrome/browser/tabs/tab_strip_model_observer.cc
+++ b/chrome/browser/tabs/tab_strip_model_observer.cc
@@ -27,6 +27,10 @@ void TabStripModelObserver::ActiveTabChanged(TabContentsWrapper* old_contents,
                                              bool user_gesture) {
 }
 
+void TabStripModelObserver::TabSelectionChanged(
+    const TabStripSelectionModel& model) {
+}
+
 void TabStripModelObserver::TabMoved(TabContentsWrapper* contents,
                                      int from_index,
                                      int to_index) {