browser: Fix some presubmit errors.

chrome/browser/geolocation/gps_location_provider_linux.h

 // Copyright (c) 2010 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.
 
 // This file declares GPS providers that run on linux. Currently, just uses
 // the libgps (gpsd) API. Public for testing only - for normal usage this
 // header should not be required, as location_provider.h declares the needed
 // factory function.
 
 #ifndef CHROME_BROWSER_GEOLOCATION_GPS_LOCATION_PROVIDER_LINUX_H_
 #define CHROME_BROWSER_GEOLOCATION_GPS_LOCATION_PROVIDER_LINUX_H_
 #pragma once
 
+#include "base/scoped_ptr.h"
+#include "base/task.h"
 #include "chrome/browser/geolocation/location_provider.h"
 #include "chrome/common/geoposition.h"
 
-#include "base/scoped_ptr.h"
-#include "base/task.h"
-
 class LibGps;
 
 // Location provider for Linux, that uses libgps/gpsd to obtain position fixes.
 // TODO(joth): Currently this runs entirely in the client thread (i.e. Chrome's
 // IO thread). As the older libgps API is not designed to support polling,
 // there's a chance it could block, so better move this into its own worker
 // thread.
 class GpsLocationProviderLinux : public LocationProviderBase {
  public:
   typedef LibGps* (*LibGpsFactory)();
   // |factory| will be used to create the gpsd client library wrapper. (Note
   // NewGpsLocationProvider() will use the default factory).
-  GpsLocationProviderLinux(LibGpsFactory libgps_factory);
+  explicit GpsLocationProviderLinux(LibGpsFactory libgps_factory);
   virtual ~GpsLocationProviderLinux();
 
   // LocationProvider
   virtual bool StartProvider(bool high_accuracy);
   virtual void StopProvider();
   virtual void GetPosition(Geoposition* position);
   virtual void UpdatePosition();
   virtual void OnPermissionGranted(const GURL& requesting_frame);
 
  private:
   // Task which run in the child thread.
   void DoGpsPollTask();
 
   // Will schedule a poll; i.e. enqueue DoGpsPollTask deferred task.
   void ScheduleNextGpsPoll(int interval);
 
   const LibGpsFactory libgps_factory_;
   scoped_ptr<LibGps> gps_;
   Geoposition position_;
 
   // Holder for the tasks which run on the thread; takes care of cleanup.
   ScopedRunnableMethodFactory<GpsLocationProviderLinux> task_factory_;
 };
 
 #endif  // CHROME_BROWSER_GEOLOCATION_GPS_LOCATION_PROVIDER_LINUX_H_