Enable PDF accessibility when RenderFrame's accessibility mode changes.

content/renderer/pepper/fake_pepper_plugin_instance.h

 // Copyright (c) 2013 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_RENDERER_PEPPER_FAKE_PEPPER_PLUGIN_INSTANCE_H_
 #define CONTENT_RENDERER_PEPPER_FAKE_PEPPER_PLUGIN_INSTANCE_H_
 
 #include <stdint.h>
 
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "url/gurl.h"
 
 namespace content {
 
 class FakePepperPluginInstance : public PepperPluginInstance {
  public:
   ~FakePepperPluginInstance() override;
 
   // PepperPluginInstance overrides.
+  content::RenderFrame* GetRenderFrame() override;
   content::RenderView* GetRenderView() override;
   blink::WebPluginContainer* GetContainer() override;
   v8::Isolate* GetIsolate() const override;
   ppapi::VarTracker* GetVarTracker() override;
   const GURL& GetPluginURL() override;
   base::FilePath GetModulePath() override;
   PP_Resource CreateImage(gfx::ImageSkia* source_image, float scale) override;
   PP_ExternalPluginResult SwitchToOutOfProcessProxy(
       const base::FilePath& file_path,
       ppapi::PpapiPermissions permissions,
@@ skipping 14 matching lines @@
   void SetTextInputType(ui::TextInputType type) override;
   void PostMessageToJavaScript(PP_Var message) override;
 
  private:
   GURL gurl_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_FAKE_PEPPER_PLUGIN_INSTANCE_H_