[sensors] Add Permission guard to the generic sensor apis.

chrome/android/java/src/org/chromium/chrome/browser/preferences/website/SensorInfo.java

+// 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.chrome.browser.preferences.website;
+
+/**
+ * Sensors information for a given origin.
+ */
+public class SensorInfo extends PermissionInfo {
+    public SensorInfo(String origin, String embedder, boolean isIncognito) {
+        super(origin, embedder, isIncognito);
+    }
+
+    protected int getNativePreferenceValue(String origin, String embedder, boolean isIncognito) {
+        return WebsitePreferenceBridge.nativeGetSensorSettingForOrigin(
+                origin, embedder, isIncognito);
+    }
+
+    protected void setNativePreferenceValue(
+            String origin, String embedder, ContentSetting value, boolean isIncognito) {
+        WebsitePreferenceBridge.nativeSetSensorSettingForOrigin(
+                origin, embedder, value.toInt(), isIncognito);
+    }
+}