Add a scroll offset to PDF documents to account for the top material design toolbar.

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 "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 215 matching lines @@
   // Gets the 0-based page number of |destination|, or -1 if it does not exist.
   virtual int GetNamedDestinationPage(const std::string& destination) = 0;
   // Gets the index of the first visible page, or -1 if none are visible.
   virtual int GetFirstVisiblePage() = 0;
   // Gets the index of the most visible page, or -1 if none are visible.
   virtual int GetMostVisiblePage() = 0;
   // Gets the rectangle of the page including shadow.
   virtual pp::Rect GetPageRect(int index) = 0;
   // Gets the rectangle of the page excluding any additional areas.
   virtual pp::Rect GetPageContentsRect(int index) = 0;
+  // 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;
   // Paints page thumbnail to the ImageData.
   virtual void PaintThumbnail(pp::ImageData* image_data, int index) = 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
@@ skipping 84 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_