Revert of Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

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_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "ipc/ipc_message.h"
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/base/ui_base_switches_util.h"
 #include "ui/events/event.h"
+#include "ui/views/accessibility/native_view_accessibility.h"
 #include "ui/views/controls/native/native_view_host.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/views_delegate.h"
 
 namespace views {
 
 // static
 const char WebView::kViewClassName[] = "WebView";
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebView, public:
 
 WebView::WebView(content::BrowserContext* browser_context)
     : holder_(new NativeViewHost()),
       observing_render_process_host_(nullptr),
       embed_fullscreen_widget_mode_enabled_(false),
       is_embedding_fullscreen_widget_(false),
       browser_context_(browser_context),
       allow_accelerators_(false) {
   AddChildView(holder_);  // Takes ownership of |holder_|.
+  NativeViewAccessibility::RegisterWebView(this);
 }
 
 WebView::~WebView() {
   SetWebContents(NULL);  // Make sure all necessary tear-down takes place.
+  NativeViewAccessibility::UnregisterWebView(this);
 }
 
 content::WebContents* WebView::GetWebContents() {
   if (!web_contents()) {
     wc_owner_.reset(CreateWebContents(browser_context_));
     wc_owner_->SetDelegate(this);
     SetWebContents(wc_owner_.get());
   }
   return web_contents();
 }
@@ skipping 368 matching lines @@
   if (!contents) {
     content::WebContents::CreateParams create_params(
         browser_context, NULL);
     return content::WebContents::Create(create_params);
   }
 
   return contents;
 }
 
 }  // namespace views