Fix some nits from r447440.

chrome/browser/printing/pwg_raster_converter.h

 // Copyright 2013 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_BROWSER_PRINTING_PWG_RASTER_CONVERTER_H_
 #define CHROME_BROWSER_PRINTING_PWG_RASTER_CONVERTER_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted_memory.h"
 #include "printing/pdf_render_settings.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace cloud_devices {
 class CloudDeviceDescription;
 }
 
 namespace gfx {
 class Size;
 }
 
 namespace printing {
 
-struct PdfRenderSettings;
 struct PwgRasterSettings;
 
 class PWGRasterConverter {
  public:
   // Callback for when the PDF is converted to a PWG raster.
   // |success| denotes whether the conversion succeeded.
   // |temp_file| is the path to the temp file (owned by the converter) that
   //     contains the PWG raster data.
   using ResultCallback =
       base::Callback<void(bool /*success*/,
@@ skipping 18 matching lines @@
 
   virtual void Start(base::RefCountedMemory* data,
                      const PdfRenderSettings& conversion_settings,
                      const PwgRasterSettings& bitmap_settings,
                      const ResultCallback& callback) = 0;
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PWG_RASTER_CONVERTER_H_