Geolocation: Extract GeolocationProvider::Delegate into GeolocationDelegate (no new code)

content/public/browser/geolocation_provider.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 CONTENT_PUBLIC_BROWSER_GEOLOCATION_PROVIDER_H_
 #define CONTENT_PUBLIC_BROWSER_GEOLOCATION_PROVIDER_H_
 
 #include <memory>
 
 #include "base/callback_list.h"
 #include "content/common/content_export.h"
 
 namespace content {
-class AccessTokenStore;
 struct Geoposition;
-class LocationProvider;
 
 // This is the main API to the geolocation subsystem. The application will hold
 // a single instance of this class and can register multiple clients to be
 // notified of location changes:
 // * Callbacks are registered by AddLocationUpdateCallback() and will keep
 //   receiving updates until the returned subscription object is destructed.
 // The application must instantiate the GeolocationProvider on the UI thread and
 // must communicate with it on the same thread.
 // The underlying location arbitrator will only be enabled whilst there is at
 // least one registered observer or pending callback (and only after
 // UserDidOptIntoLocationServices). The arbitrator and the location providers it
 // uses run on a separate Geolocation thread.
 class GeolocationProvider {
  public:
-  // An embedder of Geolocation may override these class' methods to provide
-  // specific functionality.
-  // TODO(mcasas): Extract this class into a file of its own.
-  class CONTENT_EXPORT Delegate {
-   public:
-    // Returns true if the location API should use network-based location
-    // approximation in addition to the system provider, if any.
-    virtual bool UseNetworkLocationProviders();
-
-    // Creates a new AccessTokenStore for geolocation. May return nullptr.
-    // TODO(mcasas): consider changing it return type to std::unique_ptr<> to
-    // clarify ownership, https://crbug.com/623114.
-    virtual AccessTokenStore* CreateAccessTokenStore();
-
-    // Allows an embedder to return its own LocationProvider implementation.
-    // Return nullptr to use the default one for the platform to be created.
-    // Caller takes ownership of the returned LocationProvider. FYI: Used by an
-    // external project; please don't remove. Contact Viatcheslav Ostapenko at
-    // sl.ostapenko@samsung.com for more information.
-    // TODO(mcasas): return std::unique_ptr<> instead, https://crbug.com/623132.
-    virtual LocationProvider* OverrideSystemLocationProvider();
-  };
-
   CONTENT_EXPORT static GeolocationProvider* GetInstance();
 
   typedef base::Callback<void(const Geoposition&)> LocationUpdateCallback;
   typedef base::CallbackList<void(const Geoposition&)>::Subscription
       Subscription;
 
   // |enable_high_accuracy| is used as a 'hint' for the provider preferences for
   // this particular observer, however the observer could receive updates for
   // best available locations from any active provider whilst it is registered.
   virtual std::unique_ptr<Subscription> AddLocationUpdateCallback(
@@ skipping 18 matching lines @@
   // (crbug.com/125931).
   virtual void OverrideLocationForTesting(const Geoposition& position) = 0;
 
  protected:
   virtual~GeolocationProvider() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_GEOLOCATION_PROVIDER_H_