Add private PPAPI interfaces for PDFium accessibility.

ppapi/cpp/private/pdf.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 PPAPI_CPP_PRIVATE_PDF_H_
 #define PPAPI_CPP_PRIVATE_PDF_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 40 matching lines @@
                                PP_PDFFeature feature);
   static void SetSelectedText(const InstanceHandle& instance,
                               const char* selected_text);
   static void SetLinkUnderCursor(const InstanceHandle& instance,
                                  const char* url);
   static void GetV8ExternalSnapshotData(const InstanceHandle& instance,
                                         const char** natives_data_out,
                                         int* natives_size_out,
                                         const char** snapshot_data_out,
                                         int* snapshot_size_out);
+  static void SetAccessibilityViewportInfo(
+      const InstanceHandle& instance,
+      PP_PrivateAccessibilityViewportInfo* viewport_info);
+  static void SetAccessibilityDocInfo(
+      const InstanceHandle& instance,
+      PP_PrivateAccessibilityDocInfo* doc_info);
+  static void SetAccessibilityPageInfo(
+      const InstanceHandle& instance,
+      PP_PrivateAccessibilityPageInfo* page_info,
+      PP_PrivateAccessibilityTextRunInfo text_runs[],
+      PP_PrivateAccessibilityCharInfo chars[]);
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_PRIVATE_PDF_H_