PrintPreview: Remove |page_number| from StartPageForVectorCanvas function.

printing/metafile.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_METAFILE_H_
 #define PRINTING_METAFILE_H_
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 35 matching lines @@
   // rendering resources.
   virtual bool Init() = 0;
 
   // Initializes the metafile with the data in |src_buffer|. Returns true
   // on success.
   // Note: It should only be called from within the browser process.
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size) = 0;
 
   // This method calls StartPage and then returns an appropriate
   // VectorPlatformDevice implementation bound to the context created by
-  // StartPage or NULL on error. |page_number| is zero based.
+  // StartPage or NULL on error.
   virtual SkDevice* StartPageForVectorCanvas(
-      int page_number,
       const gfx::Size& page_size,
       const gfx::Rect& content_area,
       const float& scale_factor) = 0;
 
   // Prepares a context for rendering a new page with the given |page_size|,
   // |content_area| and  a |scale_factor| to use for the drawing. The units are
   // in points (=1/72 in). Returns true on success.
   virtual bool StartPage(const gfx::Size& page_size,
                          const gfx::Rect& content_area,
                          const float& scale_factor) = 0;
@@ skipping 73 matching lines @@
   // Saves the underlying data to the file associated with fd. This function
   // should ONLY be called after the metafile is closed.
   // Returns true if writing succeeded.
   virtual bool SaveToFD(const base::FileDescriptor& fd) const = 0;
 #endif  // if defined(OS_CHROMEOS)
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_METAFILE_H_