Fix for Multipage selection by dragging mouse in OOP case in PDF.

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 <map>
 #include <string>
 #include <utility>
@@ skipping 405 matching lines @@
                  pp::ImageData* image_data,
                  void** region,
                  int* stride) const;
 
   // Called when the selection changes.
   void OnSelectionChanged();
 
   // Common code shared by RotateClockwise() and RotateCounterclockwise().
   void RotateInternal();
 
+  // Setting selection status of document.
+  void SetSelecting(bool selecting);
+
   // FPDF_FORMFILLINFO callbacks.
   static void Form_Invalidate(FPDF_FORMFILLINFO* param,
                               FPDF_PAGE page,
                               double left,
                               double top,
                               double right,
                               double bottom);
   static void Form_OutputSelectedRect(FPDF_FORMFILLINFO* param,
                                       FPDF_PAGE page,
                                       double left,
@@ skipping 311 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);
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_