Adds PrintingContext implementation stub for Android.

chrome/renderer/printing/print_web_view_helper.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 CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 213 matching lines @@
 
   void OnFramePreparedForPrintPages();
   void PrintPages();
   bool PrintPagesNative(WebKit::WebFrame* frame,
                         const WebKit::WebNode& node,
                         int page_count,
                         const gfx::Size& canvas_size);
   void FinishFramePrinting();
 
   // Prints the page listed in |params|.
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_ANDROID)
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
                          const gfx::Size& canvas_size,
                          WebKit::WebFrame* frame,
                          Metafile* metafile);
 #else
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
                          const gfx::Size& canvas_size,
                          WebKit::WebFrame* frame);
 #endif
 
@@ skipping 232 matching lines @@
   };
 
   bool print_node_in_progress_;
   PrintPreviewContext print_preview_context_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_