Use both APIs (WebAXObject and WebSettings) for enabling accessibility

content/renderer/accessibility/renderer_accessibility_complete.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 "content/renderer/accessibility/renderer_accessibility_complete.h"
 
 #include <queue>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "content/renderer/accessibility/blink_ax_enum_conversion.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/web/WebAXObject.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
+#include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebInputElement.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebNode.h"
+#include "third_party/WebKit/public/web/WebSettings.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "ui/accessibility/ax_tree.h"
 
 using blink::WebAXObject;
 using blink::WebDocument;
+using blink::WebFrame;
 using blink::WebNode;
 using blink::WebPoint;
 using blink::WebRect;
+using blink::WebSettings;
 using blink::WebView;
 
 namespace content {
 
 RendererAccessibilityComplete::RendererAccessibilityComplete(
     RenderFrameImpl* render_frame)
     : RendererAccessibility(render_frame),
       weak_factory_(this),
       tree_source_(render_frame),
       serializer_(&tree_source_),
       last_scroll_offset_(gfx::Size()),
       ack_pending_(false) {
   WebAXObject::enableAccessibility();
+  WebView* web_view = render_frame_->GetRenderView()->GetWebView();
+  WebSettings* settings = web_view->settings();
+  settings->setAccessibilityEnabled(true);
 
 #if !defined(OS_ANDROID)
   // Skip inline text boxes on Android - since there are no native Android
   // APIs that compute the bounds of a range of text, it's a waste to
   // include these in the AX tree.
   WebAXObject::enableInlineTextBoxAccessibility();
+  settings->setInlineTextBoxAccessibilityEnabled(true);
 #endif
 
   const WebDocument& document = GetMainDocument();
   if (!document.isNull()) {
     // It's possible that the webview has already loaded a webpage without
     // accessibility being enabled. Initialize the browser's cached
     // accessibility tree by sending it a notification.
     HandleAXEvent(document.accessibilityObject(),
                   ui::AX_EVENT_LAYOUT_COMPLETE);
   }
@@ skipping 347 matching lines @@
     render_frame_->GetRenderView()->GetWebView()->clearFocusedElement();
   else
     obj.setFocused(true);
 }
 
 void RendererAccessibilityComplete::OnFatalError() {
   CHECK(false) << "Invalid accessibility tree.";
 }
 
 }  // namespace content