Fix print preview clipping issues due to scaling.

printing/emf_win.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 PRINTING_EMF_WIN_H_
 #define PRINTING_EMF_WIN_H_
 
 #include <windows.h>
 #include <vector>
 
@@ skipping 28 matching lines @@
   virtual bool InitToFile(const FilePath& metafile_path);
 
   // Initializes the Emf with the data in |metafile_path|.
   virtual bool InitFromFile(const FilePath& metafile_path);
 
   // Metafile methods.
   virtual bool Init();
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   virtual skia::PlatformDevice* StartPageForVectorCanvas(
-      const gfx::Size& page_size, const gfx::Point& content_origin,
+      const gfx::Size& page_size, const gfx::Rect& content_area,
       const float& scale_factor);
   // Inserts a custom GDICOMMENT records indicating StartPage/EndPage calls
   // (since StartPage and EndPage do not work in a metafile DC). Only valid
   // when hdc_ is non-NULL. |page_size|, |content_origin|, and |scale_factor|
   // are ignored.
   virtual bool StartPage(const gfx::Size& page_size,
-                         const gfx::Point& content_origin,
+                         const gfx::Rect& content_area,
                          const float& scale_factor);
   virtual bool FinishPage();
   virtual bool FinishDocument();
 
   virtual uint32 GetDataSize() const;
   virtual bool GetData(void* buffer, uint32 size) const;
 
   // Saves the EMF data to a file as-is. It is recommended to use the .emf file
   // extension but it is not enforced. This function synchronously writes to the
   // file. For testing only.
@@ skipping 107 matching lines @@
   std::vector<Record> items_;
 
   EnumerationContext context_;
 
   DISALLOW_COPY_AND_ASSIGN(Enumerator);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_EMF_WIN_H_