chrome: Cleanup class/struct forward declarations

chrome/utility/printing_handler.h

 // Copyright 2014 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_UTILITY_PRINTING_HANDLER_H_
 #define CHROME_UTILITY_PRINTING_HANDLER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/utility/utility_message_handler.h"
 #include "ipc/ipc_platform_file.h"
 #include "printing/features/features.h"
 #include "printing/pdf_render_settings.h"
 
 #if !BUILDFLAG(ENABLE_PRINT_PREVIEW) && \
     !(BUILDFLAG(ENABLE_BASIC_PRINTING) && defined(OS_WIN))
 #error "Windows basic printing or print preview must be enabled"
 #endif
 
 namespace printing {
 
 struct PwgRasterSettings;
-struct PageRange;
 
 // Dispatches IPCs for printing.
 class PrintingHandler : public UtilityMessageHandler {
  public:
   PrintingHandler();
   ~PrintingHandler() override;
 
   // IPC::Listener:
   bool OnMessageReceived(const IPC::Message& message) override;
 
@@ skipping 36 matching lines @@
   PdfRenderSettings pdf_rendering_settings_;
   void* pdf_handle_ = nullptr;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PrintingHandler);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_UTILITY_PRINTING_HANDLER_H_