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

content/browser/geolocation/location_api_adapter_android.h

Index: content/browser/geolocation/location_api_adapter_android.h
diff --git a/content/browser/geolocation/location_api_adapter_android.h b/content/browser/geolocation/location_api_adapter_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..6e48109a090003c6a4cf10410715b1583466414a
--- /dev/null
+++ b/content/browser/geolocation/location_api_adapter_android.h
@@ -0,0 +1,85 @@
+// 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_API_ADAPTER_ANDROID_H_
+#define CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_
+
+#include "base/android/jni_weak_ref.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
+#include "base/synchronization/lock.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace content {
+class LocationProviderAndroid;
+struct Geoposition;
+
+// Interacts with JNI and reports back to LocationProviderAndroid. This class
+// creates a LocationProvider java object and listens for updates.
+// The simplified flow is:
+//   - GeolocationProvider runs in a Geolocation Thread and fetches geolocation
+//     data from a LocationProvider.
+//   - LocationProviderAndroid accesses a singleton AndroidLocationApiAdapter.
+//   - AndroidLocationApiAdapter calls via JNI and uses the main thread Looper
+//     in the java side to listen for location updates. We then bounce these
+//     updates to the Geolocation thread.
+//
+// Note that AndroidLocationApiAdapter is a singleton and there's at most only
+// one LocationProviderAndroid that has called Start().
+class AndroidLocationApiAdapter {
+ public:
+  // Starts the underlying location provider, returns true if successful.
+  // Called on the Geolocation thread.
+  bool Start(LocationProviderAndroid* location_provider, bool high_accuracy);
+  // Stops the underlying location provider.
+  // Called on the Geolocation thread.
+  void Stop();
+
+  // Returns our singleton.
+  static AndroidLocationApiAdapter* GetInstance();
+
+  // Called when initializing chrome_view to obtain a pointer to the java class.
+  static bool RegisterGeolocationService(JNIEnv* env);
+
+  // Called by JNI on main thread looper.
+  static void OnNewLocationAvailable(double latitude,
+                                     double longitude,
+                                     double time_stamp,
+                                     bool has_altitude, double altitude,
+                                     bool has_accuracy, double accuracy,
+                                     bool has_heading, double heading,
+                                     bool has_speed, double speed);
+  static void OnNewErrorAvailable(JNIEnv* env, jstring message);
+
+ private:
+  friend struct base::DefaultSingletonTraits<AndroidLocationApiAdapter>;
+  AndroidLocationApiAdapter();
+  ~AndroidLocationApiAdapter();
+
+  void CreateJavaObject(JNIEnv* env);
+
+  // Called on the JNI main thread looper.
+  void OnNewGeopositionInternal(const Geoposition& geoposition);
+
+  /// Called on the Geolocation thread.
+  static void NotifyProviderNewGeoposition(const Geoposition& geoposition);
+
+  base::android::ScopedJavaGlobalRef<jobject>
+      java_location_provider_android_object_;
+  // TODO(mvanouwerkerk): Use a callback instead of holding a pointer.
+  LocationProviderAndroid* location_provider_;  // Owned by the arbitrator.
+
+  // Guards against the following member which is accessed on Geolocation
+  // thread and the JNI main thread looper.
+  base::Lock lock_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_API_ADAPTER_ANDROID_H_