Remove legacy PDF JSON interface.

pdf/pdf_engine.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_PDF_ENGINE_H_
 #define PDF_PDF_ENGINE_H_
 
 #include <stdint.h>
 
 #include "build/build_config.h"
@@ skipping 229 matching lines @@
   // Returns a page's rect in screen coordinates, as well as its surrounding
   // border areas and bottom separator.
   virtual pp::Rect GetPageScreenRect(int page_index) const = 0;
   // Gets the offset of the vertical scrollbar from the top in document
   // coordinates.
   virtual int GetVerticalScrollbarYPosition() = 0;
   // Set color / grayscale rendering modes.
   virtual void SetGrayscale(bool grayscale) = 0;
   // Callback for timer that's set with ScheduleCallback().
   virtual void OnCallback(int id) = 0;
-  // Gets the JSON representation of the PDF file
-  virtual std::string GetPageAsJSON(int index) = 0;
   // Get the number of characters on a given page.
   virtual int GetCharCount(int page_index) = 0;
   // Get the bounds in page pixels of a character on a given page.
   virtual pp::FloatRect GetCharBounds(int page_index, int char_index) = 0;
   // Get a given unicode character on a given page.
   virtual uint32_t GetCharUnicode(int page_index, int char_index) = 0;
   // Given a start char index, find the longest continuous run of text that's
   // in a single direction and with the same style and font size. Return the
   // length of that sequence and its font size and bounding box.
   virtual void GetTextRunInfo(int page_index,
@@ skipping 90 matching lines @@
 
   // See the definition of GetPDFPageSizeByIndex in pdf.cc for details.
   virtual bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                                      int pdf_buffer_size, int page_number,
                                      double* width, double* height) = 0;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDF_ENGINE_H_