Add private PPAPI interfaces for PDFium accessibility.

pdf/out_of_process_instance.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 PDF_OUT_OF_PROCESS_INSTANCE_H_
 #define PDF_OUT_OF_PROCESS_INSTANCE_H_
 
 #include <stdint.h>
 #include <string.h>
 
@@ skipping 59 matching lines @@
   int32_t PrintBegin(const PP_PrintSettings_Dev& print_settings) override;
   pp::Resource PrintPages(
       const PP_PrintPageNumberRange_Dev* page_ranges,
       uint32_t page_range_count) override;
   void PrintEnd() override;
   bool IsPrintScalingDisabled() override;
 
   // pp::Private implementation.
   pp::Var GetLinkAtPosition(const pp::Point& point);
   void GetPrintPresetOptionsFromDocument(PP_PdfPrintPresetOptions_Dev* options);
+  void EnableAccessibility();
+
+  // Send accessibility information about the given page index.
+  void SendNextAccessibilityPage(int32_t page_index);
 
   void FlushCallback(int32_t result);
   void DidOpen(int32_t result);
   void DidOpenPreview(int32_t result);
 
   // Called when the timer is fired.
   void OnClientTimerFired(int32_t id);
 
   // Called to print without re-entrancy issues.
   void OnPrint(int32_t);
@@ skipping 245 matching lines @@
   // zooming the plugin so that flickering doesn't occur while zooming.
   bool stop_scrolling_;
 
   // The background color of the PDF viewer.
   uint32_t background_color_;
 
   // The blank space above the first page of the document reserved for the
   // toolbar.
   int top_toolbar_height_;
 
+  // Whether we should send accessibility information about the loaded PDF.
+  bool accessibility_enabled_;
+
   DISALLOW_COPY_AND_ASSIGN(OutOfProcessInstance);
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_OUT_OF_PROCESS_INSTANCE_H_