Remove unused PDFEngine ScrollPosition getter/setter.

pdf/pdfium/pdfium_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_PDFIUM_PDFIUM_ENGINE_H_
 #define PDF_PDFIUM_PDFIUM_ENGINE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 86 matching lines @@
                       int start_char_index,
                       uint32_t* out_len,
                       double* out_font_size,
                       pp::FloatRect* out_bounds) override;
   bool GetPrintScaling() override;
   int GetCopiesToPrint() override;
   int GetDuplexType() override;
   bool GetPageSizeAndUniformity(pp::Size* size) override;
   void AppendBlankPages(int num_pages) override;
   void AppendPage(PDFEngine* engine, int index) override;
-  pp::Point GetScrollPosition() override;
-  void SetScrollPosition(const pp::Point& position) override;
   bool IsProgressiveLoad() override;
   std::string GetMetadata(const std::string& key) override;
 
   // DocumentLoader::Client implementation.
   pp::Instance* GetPluginInstance() override;
   pp::URLLoader CreateURLLoader() override;
   void OnPartialDocumentLoaded() override;
   void OnPendingRequestComplete() override;
   void OnNewDataAvailable() override;
   void OnDocumentComplete() override;
@@ skipping 635 matching lines @@
   bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                              int pdf_buffer_size,
                              int page_number,
                              double* width,
                              double* height) override;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_