Added tab notification to accessibility_event_router_views.

chrome/browser/ui/views/tabs/tab_strip.cc

Index: chrome/browser/ui/views/tabs/tab_strip.cc
diff --git a/chrome/browser/ui/views/tabs/tab_strip.cc b/chrome/browser/ui/views/tabs/tab_strip.cc
index c25080761d57a07734094cd71270c39451ef618f..c33b0b1294ce99f6bb41fad200c4790e1eeaf707 100644
--- a/chrome/browser/ui/views/tabs/tab_strip.cc
+++ b/chrome/browser/ui/views/tabs/tab_strip.cc
@@ -1186,6 +1186,12 @@ bool TabStrip::IsImmersiveStyle() const {
   return immersive_style_;
 }
 
+void TabStrip::UpdateTabAccessibilityState(const Tab* tab,
+                                           ui::AXViewState* state) {
+  state->count = tab_count();
+  state->index = GetModelIndexOfTab(tab);
+}
+
 void TabStrip::MouseMovedOutOfHost() {
   ResizeLayoutTabs();
   if (reset_to_shrink_on_exit_) {