Expose cellular signal strength on Android to native

net/android/cellular_signal_strength.h

+// 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 NET_ANDROID_CELLULAR_SIGNAL_STRENGTH_H_
+#define NET_ANDROID_CELLULAR_SIGNAL_STRENGTH_H_
+
+#include <jni.h>
+
+#include "base/compiler_specific.h"
+#include "net/base/net_export.h"
+
+namespace net {
+
+namespace android {
+
+namespace cellular_signal_strength {
+
+// Returns true if the RSSI (in dbM) of the currently registered cellular
+// connection is available, and sets |rssi| to that value.

[pauljensen, 2016/05/23 12:25:10]

|rssi|->|*rssi|

[tbansal1, 2016/06/09 17:50:30]

Done.

+NET_EXPORT bool GetRssiDbm(int* rssi) WARN_UNUSED_RESULT;
+
+// Returns true if the signal level (between 0 and 4, both inclusive) of the

[pauljensen, 2016/05/23 12:25:10]

mention which of 0 or 4 is the highest and lowest

[tbansal1, 2016/06/09 17:50:30]

Done.

+// currently registered cellular connection is available, and sets
+// |signal_level| to that value.

[pauljensen, 2016/05/23 12:25:10]

|signal_level|->|*signal_level|

[tbansal1, 2016/06/09 17:50:30]

Done.

+NET_EXPORT bool GetSignalLevel(int* signal_level) WARN_UNUSED_RESULT;
+
+bool Register(JNIEnv* env);
+
+}  // namespace cellular_signal_strength
+
+}  // namespace android
+
+}  // namespace net
+
+#endif  // NET_ANDROID_CELLULAR_SIGNAL_STRENGTH_H_