Enable PDF accessibility when RenderFrame's accessibility mode changes.

components/pdf/renderer/pepper_pdf_host.h

 // Copyright 2014 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 COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
 #define COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 86 matching lines @@
       const PP_PrivateAccessibilityViewportInfo& viewport_info);
   int32_t OnHostMsgSetAccessibilityDocInfo(
       ppapi::host::HostMessageContext* context,
       const PP_PrivateAccessibilityDocInfo& doc_info);
   int32_t OnHostMsgSetAccessibilityPageInfo(
       ppapi::host::HostMessageContext* context,
       const PP_PrivateAccessibilityPageInfo& page_info,
       const std::vector<PP_PrivateAccessibilityTextRunInfo>& text_runs,
       const std::vector<PP_PrivateAccessibilityCharInfo>& chars);
 
-  void CreatePdfAccessibilityTreeIfNeeded(
-      content::PepperPluginInstance* instance);
+  void CreatePdfAccessibilityTreeIfNeeded();
 
   std::unique_ptr<PdfAccessibilityTree> pdf_accessibility_tree_;
 
   content::RendererPpapiHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperPDFHost);
 };
 
 }  // namespace pdf
 
 #endif  // COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_