bluetooth: Initial JNI setup for device/bluetooth.

device/bluetooth/android/java/src/org/chromium/device/bluetooth/BluetoothAdapter.java

Index: device/bluetooth/android/java/src/org/chromium/device/bluetooth/BluetoothAdapter.java
diff --git a/device/bluetooth/android/java/src/org/chromium/device/bluetooth/BluetoothAdapter.java b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/BluetoothAdapter.java
new file mode 100644
index 0000000000000000000000000000000000000000..07f6349ddaaa8c6954e7e93511c10cccfb41b9be
--- /dev/null
+++ b/device/bluetooth/android/java/src/org/chromium/device/bluetooth/BluetoothAdapter.java
@@ -0,0 +1,42 @@
+// Copyright 2015 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.
+
+package org.chromium.device.bluetooth;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+
+import org.chromium.base.CalledByNative;
+import org.chromium.base.JNINamespace;
+import org.chromium.base.Log;
+
+/**
+ * Exposes android.bluetooth.BluetoothAdapter as necessary for C++
+ * device::BluetoothAdapterAndroid.
+ */
+@JNINamespace("device")

[armansito, 2015/05/06 01:57:06]

It would be good to have a Java reviewer to take a look at these to make sure
that the coding style is correct.

[scheib, 2015/05/06 04:30:14]

Done.

+final class BluetoothAdapter {
+    private static final String TAG = Log.makeTag("Bluetooth");
+
+    private final boolean mHasBluetoothPermission;
+
+    @CalledByNative
+    private static BluetoothAdapter create(Context context) {
+        return new BluetoothAdapter(context);
+    }
+
+    @CalledByNative
+    private boolean hasBluetoothPermission() {
+        return mHasBluetoothPermission;
+    }
+
+    private BluetoothAdapter(Context context) {
+        mHasBluetoothPermission =
+                context.checkCallingOrSelfPermission(android.Manifest.permission.BLUETOOTH)
+                == PackageManager.PERMISSION_GRANTED;
+        if (!mHasBluetoothPermission) {
+            Log.w(TAG, "Can not use bluetooth API, requires BLUETOOTH permission.");
+        }
+    }
+}