Cleanup: Remove unneeded forward declarations from various chrome subdirectories.

chrome/service/cloud_print/print_system.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 CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_
 #define CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/callback_old.h"
 #include "base/memory/ref_counted.h"
 
 #include "printing/backend/print_backend.h"
 
 class FilePath;
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace printing {
-class PrintBackend;
 struct PrinterBasicInfo;
 struct PrinterCapsAndDefaults;
 }
 
 // This is the interface for platform-specific code for cloud print
 namespace cloud_print {
 
 typedef int PlatformJobId;
 
 enum PrintJobStatus {
@@ skipping 136 matching lines @@
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
   // Returns true if ticket is valid.
   virtual bool ValidatePrintTicket(const std::string& printer_name,
                                    const std::string& print_ticket_data) = 0;
 
   // Get details for already spooled job.
   virtual bool GetJobDetails(const std::string& printer_name,
                              PlatformJobId job_id,
-                             PrintJobDetails *job_details) = 0;
+                             PrintJobDetails* job_details) = 0;
 
   // Factory methods to create corresponding watcher. Callee is responsible
   // for deleting objects. Return NULL if failed.
   virtual PrintServerWatcher* CreatePrintServerWatcher() = 0;
   virtual PrinterWatcher* CreatePrinterWatcher(
       const std::string& printer_name) = 0;
   virtual JobSpooler* CreateJobSpooler() = 0;
 
   // Returns a comma separated list of mimetypes for print data that are
   // supported by this print system. The format of this string is the same as
@@ skipping 15 matching lines @@
 // Visual Studio where it gets confused between multiple Delegate
 // classes and gives a C2500 error. (I saw this error on the try bots -
 // the workaround was not needed for my machine).
 typedef PrintSystem::PrintServerWatcher::Delegate PrintServerWatcherDelegate;
 typedef PrintSystem::PrinterWatcher::Delegate PrinterWatcherDelegate;
 typedef PrintSystem::JobSpooler::Delegate JobSpoolerDelegate;
 
 }  // namespace cloud_print
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINT_SYSTEM_H_