Added tab notification to accessibility_event_router_views.

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/tabs/tab_strip.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
@@ skipping 1165 matching lines @@
       clip->SetRect(x, 0, tab_bounds.width() - x, tab_bounds.height());
     }
   }
   return true;
 }
 
 bool TabStrip::IsImmersiveStyle() const {
   return immersive_style_;
 }
 
+void TabStrip::UpdateTabAccessibilityState(const Tab* tab,
+                                                ui::AXViewState* state) {

[sky, 2014/07/23 17:38:42]

nit: indentation.

[evy, 2014/07/23 18:44:11]

Done.

+  state->count = tab_count();
+  state->index = GetModelIndexOfTab(tab);

[sky, 2014/07/23 17:38:42]

Do you care if this returns -1?

[evy, 2014/07/23 18:44:11]

Is there a case where the user hovers over/touches an existing tab and the index
is -1?
And in this case, I think the speech would say "tab 0 of $COUNT" - do you think
we should do something to change what's read in this case?

+}
+
 void TabStrip::MouseMovedOutOfHost() {
   ResizeLayoutTabs();
   if (reset_to_shrink_on_exit_) {
     reset_to_shrink_on_exit_ = false;
     SetStackedLayout(false);
     controller_->StackedLayoutMaybeChanged();
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 1517 matching lines @@
         action = TouchUMA::GESTURE_TABSWITCH_TAP;
       TouchUMA::RecordGestureAction(action);
       break;
     }
 
     default:
       break;
   }
   event->SetHandled();
 }