Cleanup: Remove unused variables in chrome/ found by Scythe.

chrome/browser/service_process/service_process_control.h

 // Copyright (c) 2012 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_SERVICE_PROCESS_SERVICE_PROCESS_CONTROL_H_
 #define CHROME_BROWSER_SERVICE_PROCESS_SERVICE_PROCESS_CONTROL_H_
 
 #include <queue>
 #include <set>
 #include <string>
@@ skipping 127 matching lines @@
   // reply from service. The method resets any previous callback.
   // This call starts service if needed.
   bool GetPrinters(const PrintersCallback& enumerate_printers_callback);
 
  private:
   // This class is responsible for launching the service process on the
   // PROCESS_LAUNCHER thread.
   class Launcher
       : public base::RefCountedThreadSafe<ServiceProcessControl::Launcher> {
    public:
-    Launcher(ServiceProcessControl* process,
-             scoped_ptr<base::CommandLine> cmd_line);
+    explicit Launcher(scoped_ptr<base::CommandLine> cmd_line);
     // Execute the command line to start the process asynchronously. After the
     // command is executed |task| is called with the process handle on the UI
     // thread.
     void Run(const base::Closure& task);
 
     bool launched() const { return launched_; }
 
    private:
     friend class base::RefCountedThreadSafe<ServiceProcessControl::Launcher>;
     virtual ~Launcher();
 
 #if !defined(OS_MACOSX)
     void DoDetectLaunched();
 #endif  // !OS_MACOSX
 
     void DoRun();
     void Notify();
-    ServiceProcessControl* process_control_;
     scoped_ptr<base::CommandLine> cmd_line_;
     base::Closure notify_task_;
     bool launched_;
     uint32 retry_count_;
     base::Process process_;
   };
 
   friend class MockServiceProcessControl;
   friend class CloudPrintProxyPolicyStartupTest;
 
@@ skipping 50 matching lines @@
   // the service process.
   base::Closure histograms_callback_;
 
   content::NotificationRegistrar registrar_;
 
   // Callback that gets invoked if service didn't reply in time.
   base::CancelableClosure histograms_timeout_callback_;
 };
 
 #endif  // CHROME_BROWSER_SERVICE_PROCESS_SERVICE_PROCESS_CONTROL_H_