Remove metafile casts.

chrome/renderer/print_web_view_helper_mac.mm

 // 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.
 
 #include "chrome/renderer/print_web_view_helper.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
@@ skipping 71 matching lines @@
 
   base::TimeTicks begin_time = base::TimeTicks::Now();
   RenderPage(printParams.page_size, content_area, scale_factor, page_number,
              print_preview_context_.frame(), initial_render_metafile);
   print_preview_context_.RenderedPreviewPage(
       base::TimeTicks::Now() - begin_time);
 
   if (print_preview_context_.IsModifiable()) {
 #if defined(USE_SKIA)
     DCHECK(!draft_metafile.get());
-    draft_metafile.reset(reinterpret_cast<printing::PreviewMetafile*>(
-        print_preview_context_.metafile())->GetMetafileForCurrentPage());
+    draft_metafile.reset(
+        print_preview_context_.metafile()->GetMetafileForCurrentPage());
 #else
     draft_metafile->FinishDocument();
 
     // With CG, we rendered into a new metafile so we could get it as a draft
     // document.  Now we need to add it to complete document.  But the document
     // has already been scaled and adjusted for margins, so do a 1:1 drawing.
     printing::Metafile* complete_metafile = print_preview_context_.metafile();
     bool success = complete_metafile->StartPage(
         printParams.page_size, gfx::Rect(printParams.page_size), 1.0);
     DCHECK(success);
@@ skipping 42 matching lines @@
     base::mac::ScopedNSAutoreleasePool pool;
     CGContextRef cgContext = metafile->context();
     CGContextRef canvasPtr = cgContext;
 #endif
     frame->printPage(page_number, canvasPtr);
   }
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   metafile->FinishPage();
 }