Ensure WebView notifies desktop automation on creation, destruction, and change

ui/views/controls/webview/webview.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 "ui/views/controls/webview/webview.h"
 
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 262 matching lines @@
 void WebView::RenderProcessGone(base::TerminationStatus status) {
   NotifyMaybeTextInputClientChanged();
 }
 
 void WebView::RenderViewHostChanged(content::RenderViewHost* old_host,
                                     content::RenderViewHost* new_host) {
   FocusManager* const focus_manager = GetFocusManager();
   if (focus_manager && focus_manager->GetFocusedView() == this)
     OnFocus();
   NotifyMaybeTextInputClientChanged();
+  NotifyAccessibilityEvent(ui::AX_EVENT_LAYOUT_COMPLETE, true);

[dmazzoni, 2015/01/27 21:53:45]

What do you think about AX_EVENT_CHILDREN_CHANGED? That seems the most logical
to me since the child of this object in the AX hierarchy is the document / web
area, and this is called when that object changes.

[David Tseng, 2015/01/27 22:04:50]

Done.

 }
 
 void WebView::DidShowFullscreenWidget(int routing_id) {
   if (embed_fullscreen_widget_mode_enabled_)
     ReattachForFullscreenChange(true);
 }
 
 void WebView::DidDestroyFullscreenWidget(int routing_id) {
   if (embed_fullscreen_widget_mode_enabled_)
     ReattachForFullscreenChange(false);
@@ skipping 92 matching lines @@
   if (!contents) {
     content::WebContents::CreateParams create_params(
         browser_context, NULL);
     return content::WebContents::Create(create_params);
   }
 
   return contents;
 }
 
 }  // namespace views