Add a mechanism to pause and resume geolocation requests.

content/browser/geolocation/location_provider_base.h

 // Copyright (c) 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 CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_
 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_
 
 #include "content/common/content_export.h"
 #include "content/port/browser/location_provider.h"
 
 namespace content {
 
 class CONTENT_EXPORT LocationProviderBase
     : NON_EXPORTED_BASE(public LocationProvider) {
  public:
   LocationProviderBase();
   virtual ~LocationProviderBase();
 
+  virtual void PauseProvider() OVERRIDE;
+  virtual void ResumeProvider() OVERRIDE;
+
  protected:
   void NotifyCallback(const Geoposition& position);
 
   // Overridden from LocationProvider:
   virtual void SetUpdateCallback(
       const LocationProviderUpdateCallback& callback) OVERRIDE;
   virtual void RequestRefresh() OVERRIDE;
 
  private:
   LocationProviderUpdateCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationProviderBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_