Add more fine-grained accessibility modes.

content/public/browser/web_contents.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 288 matching lines @@
       const std::string& frame_name) = 0;
 
   // Returns the committed WebUI if one exists, otherwise the pending one.
   virtual WebUI* GetWebUI() const = 0;
   virtual WebUI* GetCommittedWebUI() const = 0;
 
   // Allows overriding the user agent used for NavigationEntries it owns.
   virtual void SetUserAgentOverride(const std::string& override) = 0;
   virtual const std::string& GetUserAgentOverride() const = 0;
 
-  // Enable the accessibility tree for this WebContents in the renderer,
-  // but don't enable creating a native accessibility tree on the browser
-  // side.
-  virtual void EnableTreeOnlyAccessibilityMode() = 0;
+  // Set the accessibility mode so that accessibility events are forwarded
+  // to each WebContentsObserver.
+  virtual void EnableWebContentsOnlyAccessibilityMode();
 
-  // Returns true only if "tree only" accessibility mode is on.
-  virtual bool IsTreeOnlyAccessibilityModeForTesting() const = 0;
+  // Returns true only if the WebContentsObserver accessibility mode is
+  // enabled.
+  virtual bool IsWebContentsOnlyAccessibilityModeForTesting() const = 0;
 
   // Returns true only if complete accessibility mode is on, meaning there's
   // both renderer accessibility, and a native browser accessibility tree.
   virtual bool IsFullAccessibilityModeForTesting() const = 0;
 
   virtual const PageImportanceSignals& GetPageImportanceSignals() const = 0;
 
   // Tab navigation state ------------------------------------------------------
 
   // Returns the current navigation properties, which if a navigation is
@@ skipping 443 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_