Revert of Reland: Geolocation: move from content/browser to device/

content/browser/geolocation/location_arbitrator_impl.h

Index: content/browser/geolocation/location_arbitrator_impl.h
diff --git a/content/browser/geolocation/location_arbitrator_impl.h b/content/browser/geolocation/location_arbitrator_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..15902b6528ff1f54f5bdd488f7b62845ffaa894e
--- /dev/null
+++ b/content/browser/geolocation/location_arbitrator_impl.h
@@ -0,0 +1,128 @@
+// 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_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_
+#define CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_
+
+#include <stdint.h>
+#include <vector>
+
+#include "base/callback_forward.h"
+#include "base/cancelable_callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+#include "base/strings/string16.h"
+#include "base/time/time.h"
+#include "content/browser/geolocation/location_arbitrator.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/access_token_store.h"
+#include "content/public/browser/geolocation_provider.h"
+#include "content/public/browser/location_provider.h"
+#include "content/public/common/geoposition.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+namespace content {
+class AccessTokenStore;
+class GeolocationDelegate;
+class LocationProvider;
+
+// 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 CONTENT_EXPORT LocationArbitratorImpl : public LocationArbitrator {
+ 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_t kFixStaleTimeoutMilliseconds;
+
+  typedef base::Callback<void(const Geoposition&)> LocationUpdateCallback;
+
+  LocationArbitratorImpl(const LocationUpdateCallback& callback,
+                         GeolocationDelegate* delegate);
+  ~LocationArbitratorImpl() override;
+
+  static GURL DefaultNetworkProviderURL();
+
+  // LocationArbitrator
+  void StartProviders(bool enable_high_accuracy) override;
+  void StopProviders() override;
+  void OnPermissionGranted() override;
+  bool HasPermissionBeenGranted() const override;
+
+ protected:
+  // These functions are useful for injection of dependencies in derived
+  // testing classes.
+  virtual scoped_refptr<AccessTokenStore> NewAccessTokenStore();
+  virtual std::unique_ptr<LocationProvider> NewNetworkLocationProvider(
+      const scoped_refptr<AccessTokenStore>& access_token_store,
+      const scoped_refptr<net::URLRequestContextGetter>& context,
+      const GURL& url,
+      const base::string16& access_token);
+  virtual std::unique_ptr<LocationProvider> NewSystemLocationProvider();
+  virtual base::Time GetTimeNow() const;
+
+ private:
+  friend class TestingLocationArbitrator;
+
+  scoped_refptr<AccessTokenStore> GetAccessTokenStore();
+
+  // Provider will either be added to |providers_| or
+  // deleted on error (e.g. it fails to start).
+  void RegisterProvider(std::unique_ptr<LocationProvider> provider);
+
+  void RegisterSystemProvider();
+  void OnAccessTokenStoresLoaded(
+      AccessTokenStore::AccessTokenMap access_token_map,
+      const scoped_refptr<net::URLRequestContextGetter>& context_getter);
+  void DoStartProviders();
+
+  // Gets called when a provider has a new position.
+  void OnLocationUpdate(const LocationProvider* provider,
+                        const Geoposition& new_position);
+
+  // 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;
+
+  GeolocationDelegate* delegate_;
+
+  scoped_refptr<AccessTokenStore> access_token_store_;
+  LocationUpdateCallback arbitrator_update_callback_;
+  LocationProvider::LocationProviderUpdateCallback provider_update_callback_;
+
+  // The CancelableCallback will prevent OnAccessTokenStoresLoaded from being
+  // called multiple times by calling Reset() at the time of binding.
+  base::CancelableCallback<void(
+      AccessTokenStore::AccessTokenMap,
+      const scoped_refptr<net::URLRequestContextGetter>&)>
+      token_store_callback_;
+  std::vector<std::unique_ptr<LocationProvider>> providers_;
+  bool enable_high_accuracy_;
+  // The provider which supplied the current |position_|
+  const LocationProvider* position_provider_;
+  bool is_permission_granted_;
+  // The current best estimate of our position.
+  Geoposition position_;
+
+  // Tracks whether providers should be running.
+  bool is_running_;
+
+  DISALLOW_COPY_AND_ASSIGN(LocationArbitratorImpl);
+};
+
+// Factory functions for the various types of location provider to abstract
+// over the platform-dependent implementations.
+std::unique_ptr<LocationProvider> NewSystemLocationProvider();
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_