[sensors] Android platform adaptation for Generic Sensor API

device/generic_sensor/android/java/src/org/chromium/device/sensors/PlatformSensor.java

Index: device/generic_sensor/android/java/src/org/chromium/device/sensors/PlatformSensor.java
diff --git a/device/generic_sensor/android/java/src/org/chromium/device/sensors/PlatformSensor.java b/device/generic_sensor/android/java/src/org/chromium/device/sensors/PlatformSensor.java
new file mode 100644
index 0000000000000000000000000000000000000000..4d1621b781467bd279a8c95db830989650d74ea4
--- /dev/null
+++ b/device/generic_sensor/android/java/src/org/chromium/device/sensors/PlatformSensor.java
@@ -0,0 +1,48 @@
+// 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.
+
+package org.chromium.device.sensors;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+/**
+ * Base class that is wrapped by device::PlatformSensorAndroid and should be used to implement
+ * concrete sensors. Lifetime is controlled by the device::PlatformSensorAndroid.
+ */
+@JNINamespace("device")
+public abstract class PlatformSensor {
+    protected long mNativePlatformSensorAndroid;
+    protected ByteBuffer mBuffer;
+    protected ByteBuffer mSensorReadingData;
+
+    protected PlatformSensor() {}
+
+    @CalledByNative
+    private void initPlatformSensorAndroid(long nativePlatformSensorAndroid, ByteBuffer buffer) {
+        mNativePlatformSensorAndroid = nativePlatformSensorAndroid;
+        mBuffer = buffer;
+        mSensorReadingData = ByteBuffer.allocate(mBuffer.capacity());
+        mSensorReadingData.order(ByteOrder.nativeOrder());
+    }
+
+    @CalledByNative
+    protected abstract int getReportingMode();
+
+    @CalledByNative
+    protected abstract boolean startSensor(SensorConfiguration configuration);
+
+    @CalledByNative
+    protected abstract void stopSensor();
+
+    @CalledByNative
+    protected abstract boolean checkSensorConfiguration(SensorConfiguration configuration);
+
+    protected native void nativeNotifyPlatformSensorReadingChanged(
+            long nativePlatformSensorAndroid);
+    protected native void nativeNotifyPlatformSensorError(long nativePlatformSensorAndroid);
+}