Expose cellular signal strength on Android to native

net/android/cellular_signal_strength.h

Index: net/android/cellular_signal_strength.h
diff --git a/net/android/cellular_signal_strength.h b/net/android/cellular_signal_strength.h
new file mode 100644
index 0000000000000000000000000000000000000000..80d95b6d15ae495aa4c8ec0024e6d46436230c4d
--- /dev/null
+++ b/net/android/cellular_signal_strength.h
@@ -0,0 +1,37 @@
+// 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 <stdint.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.
+NET_EXPORT bool GetRssiDbm(int64_t* rssi) WARN_UNUSED_RESULT;

[pauljensen, 2016/04/22 11:54:12]

why int64_t?  why not int32_t?

[tbansal1, 2016/04/28 20:12:02]

Changed to int*. Done.

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

can we change to int32_t so it's more defined?

+
+// Returns true if the signal level (between 0 and 4, both inclusive) of the
+// currently registered cellular connection is available, and sets
+// |signal_level| to that value.
+NET_EXPORT bool GetSignalLevel(int64_t* signal_level) WARN_UNUSED_RESULT;

[pauljensen, 2016/04/22 11:54:12]

why not just int?

[tbansal1, 2016/04/28 20:12:02]

Done.

+
+bool Register(JNIEnv* env);
+
+}  // namespace cellular_signal_strength
+
+}  // namespace android
+
+}  // namespace net
+
+#endif  // NET_ANDROID_CELLULAR_SIGNAL_STRENGTH_H_