Fix print preview clipping issues due to scaling.

chrome/renderer/print_web_view_helper.h

 // Copyright (c) 2011 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_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
@@ skipping 167 matching lines @@
   bool CreatePreviewDocument(const PrintMsg_PrintPages_Params& params,
                              WebKit::WebFrame* frame,
                              WebKit::WebNode* node);
 
   // Platform specific helper function for rendering page(s) to |metafile|.
 #if defined(OS_WIN)
   void RenderPage(const PrintMsg_Print_Params& params, float* scale_factor,
                   int page_number, bool is_preview, WebKit::WebFrame* frame,
                   scoped_ptr<printing::Metafile>* metafile);
 #elif defined(OS_MACOSX)
-  void RenderPage(const gfx::Size& page_size, const gfx::Point& content_origin,
+  void RenderPage(const gfx::Size& page_size, const gfx::Rect& page_size,
                   const float& scale_factor, int page_number,
                   WebKit::WebFrame* frame, printing::Metafile* metafile);
 #elif defined(OS_POSIX)
   bool RenderPages(const PrintMsg_PrintPages_Params& params,
                    WebKit::WebFrame* frame,
                    WebKit::WebNode* node,
                    bool send_expected_page_count,
                    int* page_count,
                    printing::Metafile* metafile);
 #endif  // defined(OS_WIN)
@@ skipping 45 matching lines @@
 
   scoped_ptr<PrintMsg_PrintPages_Params> print_pages_params_;
   base::Time last_cancelled_script_print_;
   int user_cancelled_scripted_print_count_;
   bool is_preview_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 #endif  // CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_