Adds EngineGeolocationFeature for Blimp Geolocation project.

blimp/engine/feature/geolocation/engine_geolocation_feature.h

Index: blimp/engine/feature/geolocation/engine_geolocation_feature.h
diff --git a/blimp/engine/feature/geolocation/engine_geolocation_feature.h b/blimp/engine/feature/geolocation/engine_geolocation_feature.h
new file mode 100644
index 0000000000000000000000000000000000000000..f42ffada155b972efc1640d9547d5aef3ee2506d
--- /dev/null
+++ b/blimp/engine/feature/geolocation/engine_geolocation_feature.h
@@ -0,0 +1,47 @@
+// Copyright 2016 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 BLIMP_ENGINE_FEATURE_GEOLOCATION_ENGINE_GEOLOCATION_FEATURE_H_
+#define BLIMP_ENGINE_FEATURE_GEOLOCATION_ENGINE_GEOLOCATION_FEATURE_H_
+
+#include "blimp/engine/feature/geolocation/blimp_location_provider.h"
+#include "blimp/net/blimp_message_processor.h"
+#include "content/public/common/geoposition.h"
+
+namespace blimp {
+namespace engine {
+
+// Handles all incoming and outgoing protobuf messages types tied to
+// geolocation. Delegates are notified of incoming messages by

[Kevin M, 2016/06/29 17:52:56]

* There are no "delegates" here (implies calls are *sent* via a delegate) - the
class is a delegate (*receives* calls).
* The delegate methods do not receive messages.

[CJ, 2016/07/11 23:21:07]

Just removed stuff of delegates, and will update it on BlimpLocationProvider.

+// EngineGeolocationFeature.
+class EngineGeolocationFeature
+    : public BlimpMessageProcessor,
+      BlimpLocationProvider::BlimpLocationProviderDelegate {
+ public:
+  EngineGeolocationFeature();
+  ~EngineGeolocationFeature() override;
+
+  void set_outgoing_message_processor(
+      std::unique_ptr<BlimpMessageProcessor> message_processor);
+
+  // BlimpLocationProviderDelegate implementation.
+  void SendUpdateListenStateMessage(bool enable_high_accuracy) override;
+  void SendStopListenStateMessage() override;
+  void SendRequestRefreshMessage() override;
+
+  // BlimpMessageProcessor implementation.
+  void ProcessMessage(std::unique_ptr<BlimpMessage> message,
+                      const net::CompletionCallback& callback) override;
+
+ private:
+  BlimpLocationProvider* location_provider_;

[Kevin M, 2016/06/29 17:52:56]

This is never set?

[CJ, 2016/07/11 23:21:08]

Done.

+  std::unique_ptr<BlimpMessageProcessor> outgoing_message_processor_;
+
+  DISALLOW_COPY_AND_ASSIGN(EngineGeolocationFeature);
+};
+
+}  // namespace engine
+}  // namespace blimp
+
+#endif  // BLIMP_ENGINE_FEATURE_GEOLOCATION_ENGINE_GEOLOCATION_FEATURE_H_