Move core pieces of geolocation from chrome to content....

chrome/browser/geolocation/location_arbitrator.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.
-
-#ifndef CHROME_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_
-#define CHROME_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_
-#pragma once
-
-#include "base/string16.h"
-#include "base/scoped_vector.h"
-#include "base/time.h"
-#include "chrome/browser/geolocation/access_token_store.h"
-#include "chrome/browser/geolocation/location_provider.h"
-#include "chrome/browser/geolocation/geolocation_observer.h"
-#include "chrome/common/geoposition.h"
-#include "chrome/common/net/url_request_context_getter.h"
-#include "googleurl/src/gurl.h"
-
-class AccessTokenStore;
-class GeolocationArbitratorDependencyFactory;
-class GURL;
-class LocationProviderBase;
-class URLRequestContextGetter;
-struct Geoposition;
-
-// This class is responsible for handling updates from multiple underlying
-// providers and resolving them to a single 'best' location fix at any given
-// moment.
-class GeolocationArbitrator : public LocationProviderBase::ListenerInterface {
- public:
-  // Number of milliseconds newer a location provider has to be that it's worth
-  // switching to this location provider on the basis of it being fresher
-  // (regardles of relative accuracy). Public for tests.
-  static const int64 kFixStaleTimeoutMilliseconds;
-
-  // Defines a function that returns the current time.
-  typedef base::Time (*GetTimeNow)();
-
-  ~GeolocationArbitrator();
-
-  static GeolocationArbitrator* Create(GeolocationObserver* observer);
-
-  // See more details in geolocation_provider.
-  void StartProviders(const GeolocationObserverOptions& options);
-  void StopProviders();
-
-  // Called everytime permission is granted to a page for using geolocation.
-  // This may either be through explicit user action (e.g. responding to the
-  // infobar prompt) or inferred from a persisted site permission.
-  // The arbitrator will inform all providers of this, which may in turn use
-  // this information to modify their internal policy.
-  void OnPermissionGranted(const GURL& requesting_frame);
-
-  // Returns true if this arbitrator has received at least one call to
-  // OnPermissionGranted().
-  bool HasPermissionBeenGranted() const;
-
-  // Call this function every time you need to create an specially parameterised
-  // arbitrator.
-  static void SetDependencyFactoryForTest(
-      GeolocationArbitratorDependencyFactory* factory);
-
-  // ListenerInterface
-  virtual void LocationUpdateAvailable(LocationProviderBase* provider);
-
- private:
-  GeolocationArbitrator(
-      GeolocationArbitratorDependencyFactory* dependency_factory,
-      GeolocationObserver* observer);
-  // Takes ownership of |provider| on entry; it will either be added to
-  // |providers_| or deleted on error (e.g. it fails to start).
-  void RegisterProvider(LocationProviderBase* provider);
-  void OnAccessTokenStoresLoaded(
-      AccessTokenStore::AccessTokenSet access_token_store);
-  void StartProviders();
-  // Returns true if |new_position| is an improvement over |old_position|.
-  // Set |from_same_provider| to true if both the positions came from the same
-  // provider.
-  bool IsNewPositionBetter(const Geoposition& old_position,
-                           const Geoposition& new_position,
-                           bool from_same_provider) const;
-
-  scoped_refptr<GeolocationArbitratorDependencyFactory> dependency_factory_;
-  scoped_refptr<AccessTokenStore> access_token_store_;
-  scoped_refptr<URLRequestContextGetter> context_getter_;
-  GetTimeNow get_time_now_;
-  GeolocationObserver* observer_;
-  ScopedVector<LocationProviderBase> providers_;
-  GeolocationObserverOptions current_provider_options_;
-  // The provider which supplied the current |position_|
-  const LocationProviderBase* position_provider_;
-  GURL most_recent_authorized_frame_;
-  CancelableRequestConsumer request_consumer_;
-  // The current best estimate of our position.
-  Geoposition position_;
-
-  DISALLOW_COPY_AND_ASSIGN(GeolocationArbitrator);
-};
-
-#endif  // CHROME_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_