Unify some platform-specific methods for PrintWebViewHelper.

components/printing/renderer/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 COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #define COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 250 matching lines @@
   void OnFramePreparedForPrintPages();
   void PrintPages();
   bool PrintPagesNative(blink::WebFrame* frame, int page_count);
   void FinishFramePrinting();
   // Render the frame for printing.
   bool RenderPagesForPrint(blink::WebLocalFrame* frame,
                            const blink::WebNode& node);
 #endif  // defined(ENABLE_BASIC_PRINTING)
 
   // Prints the page listed in |params|.
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+#if defined(OS_MACOSX)
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
-                         blink::WebFrame* frame,
-                         PdfMetafileSkia* metafile);
-#elif defined(OS_WIN)
+                         blink::WebFrame* frame);
+#else
   void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
                          blink::WebFrame* frame,
                          PdfMetafileSkia* metafile,
                          gfx::Size* page_size_in_dpi,
                          gfx::Rect* content_area_in_dpi);
-#else
-  void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
-                         blink::WebFrame* frame);
-#endif
+#endif  // defined(OS_MACOSX)
 
   // Platform specific helper function for rendering page(s) to |metafile|.
 #if defined(OS_MACOSX)
   void RenderPage(const PrintMsg_Print_Params& params,
                   int page_number,
                   blink::WebFrame* frame,
                   bool is_preview,
                   PdfMetafileSkia* metafile,
                   gfx::Size* page_size,
                   gfx::Rect* content_rect);
@@ skipping 233 matching lines @@
   base::Closure on_stop_loading_closure_;
 
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // COMPONENTS_PRINTING_RENDERER_PRINT_WEB_VIEW_HELPER_H_