Introduce View::CanProcessEventsWithinSubtree()

ui/views/view_targeter.cc

 // Copyright 2014 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 "ui/views/view_targeter.h"
 
 #include "ui/events/event_target.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/view.h"
 
@@ skipping 30 matching lines @@
     ui::Event* event) {
   return previous_target->GetParentTarget();
 }
 
 bool ViewTargeter::SubtreeCanAcceptEvent(
     ui::EventTarget* target,
     const ui::LocatedEvent& event) const {
   views::View* view = static_cast<views::View*>(target);
   if (!view->visible())
     return false;
+
+  if (!view->CanProcessEventsWithinSubtree())
+    return false;
+
   return true;
 }
 
 bool ViewTargeter::EventLocationInsideBounds(
     ui::EventTarget* target,
     const ui::LocatedEvent& event) const {
   views::View* view = static_cast<views::View*>(target);
   gfx::Rect rect(event.location(), gfx::Size(1, 1));
   gfx::RectF rect_in_view_coords_f(rect);
   if (view->parent())
     View::ConvertRectToTarget(view->parent(), view, &rect_in_view_coords_f);
   gfx::Rect rect_in_view_coords = gfx::ToEnclosingRect(rect_in_view_coords_f);
 
   // TODO(tdanderson): Don't call into HitTestRect() directly here.
   //                   See crbug.com/370579.
   return view->HitTestRect(rect_in_view_coords);
 }
 
 View* ViewTargeter::FindTargetForKeyEvent(View* view, const ui::KeyEvent& key) {
   if (view->GetFocusManager())
     return view->GetFocusManager()->GetFocusedView();
   return NULL;
 }
 
 }  // namespace aura