Remove unused PDFEngine ScrollPosition getter/setter.

pdf/pdfium/pdfium_engine.cc

 // 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.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 995 matching lines @@
   FPDF_ImportPages(doc_,
                    static_cast<PDFiumEngine*>(engine)->doc(),
                    "1",
                    index);
   pp::Size new_page_size = GetPageSize(index);
   if (curr_page_size != new_page_size)
     LoadPageInfo(true);
   client_->Invalidate(GetPageScreenRect(index));
 }
 
-pp::Point PDFiumEngine::GetScrollPosition() {
-  return position_;
-}
-
-void PDFiumEngine::SetScrollPosition(const pp::Point& position) {
-  position_ = position;
-}
-
 bool PDFiumEngine::IsProgressiveLoad() {
   return doc_loader_.is_partial_document();
 }
 
 std::string PDFiumEngine::GetMetadata(const std::string& key) {
   return GetDocumentMetadata(doc(), key);
 }
 
 void PDFiumEngine::OnPartialDocumentLoaded() {
   file_access_.m_FileLen = doc_loader_.document_size();
@@ skipping 2884 matching lines @@
   FPDF_DOCUMENT doc =
       FPDF_LoadMemDocument(pdf_buffer, pdf_buffer_size, nullptr);
   if (!doc)
     return false;
   bool success = FPDF_GetPageSizeByIndex(doc, page_number, width, height) != 0;
   FPDF_CloseDocument(doc);
   return success;
 }
 
 }  // namespace chrome_pdf