Added tab notification to accessibility_event_router_views.

chrome/browser/ui/views/tabs/tab_controller.h

Index: chrome/browser/ui/views/tabs/tab_controller.h
diff --git a/chrome/browser/ui/views/tabs/tab_controller.h b/chrome/browser/ui/views/tabs/tab_controller.h
index d20a178673dd12214ce7b9997e494d5d2129f23d..aa14acb8b5be7dcdac76bbeb83e89e5747a1c3c2 100644
--- a/chrome/browser/ui/views/tabs/tab_controller.h
+++ b/chrome/browser/ui/views/tabs/tab_controller.h
@@ -89,6 +89,13 @@ class TabController {
   // Returns true if tabs painted in the rectangular light-bar style.
   virtual bool IsImmersiveStyle() const = 0;
 
+  // Returns the index of the specified tab in the model coordinate system, or
+  // -1 if tab is closing or not valid.
+  virtual int GetModelIndexOfTab(const Tab* tab) const = 0;

[sky, 2014/07/17 04:06:10]

If we can I would like to avoid exposing this state. Could you instead add an
explicit function that adds the state you care about for accessibility.
Something like GetTabAccessibilityState(Tab* ...)?

[evy, 2014/07/21 17:54:15]

That's a great way to do it! Thanks

I wasn't sure if you meant "explicit" as in using the explicit keyword - I'm not
as familiar with it. I looked into it a bit and I noticed it's mostly used for
constructors, so I didn't include it here but I figured I'd ask just in case.

+
+  // Gets the number of Tabs in the tab strip.
+  virtual int GetTabCount() const = 0;
+
  protected:
   virtual ~TabController() {}
 };