Switch the background color in PDF Viewer when using Material Design

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 13 matching lines @@
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/size.h"
 #include "ppapi/cpp/url_loader.h"
 #include "ppapi/cpp/var_array.h"
 
 namespace pp {
 class InputEvent;
 class VarDictionary;
 }
 
-const uint32 kBackgroundColor = 0xFFCCCCCC;
-
 namespace chrome_pdf {
 
 class Stream;
 
 #if defined(OS_MACOSX)
 const uint32 kDefaultKeyModifier = PP_INPUTEVENT_MODIFIER_METAKEY;
 #else  // !OS_MACOSX
 const uint32 kDefaultKeyModifier = PP_INPUTEVENT_MODIFIER_CONTROLKEY;
 #endif  // OS_MACOSX
 
@@ skipping 195 matching lines @@
   // 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;
   // Gets the PDF document's print scaling preference. True if the document can
   // be scaled to fit.
   virtual bool GetPrintScaling() = 0;
   // Returns number of copies to be printed.
   virtual int GetCopiesToPrint() = 0;
 
+  // Retrieve the background color of the PDF viewer.
+  virtual uint32 GetBackgroundColor() = 0;
+  // Set the background color of the PDF viewer.
+  virtual void SetBackgroundColor(uint32 background_color) = 0;
+
   // Returns a VarArray of Bookmarks, each a VarDictionary containing the
   // following key/values:
   // - "title" - a string Var.
   // - "page" - an int Var.
   // - "children" - a VarArray(), with each entry containing a VarDictionary of
   //   the same structure.
   virtual pp::VarArray GetBookmarks() = 0;
 
   // Append blank pages to make a 1-page document to a |num_pages| document.
   // Always retain the first page data.
@@ skipping 64 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_