precache: Move the java files into //components/precache/android

components/precache/android/java/src/org/chromium/components/precache/DeviceState.java

Index: components/precache/android/java/src/org/chromium/components/precache/DeviceState.java
diff --git a/components/precache/android/java/src/org/chromium/components/precache/DeviceState.java b/components/precache/android/java/src/org/chromium/components/precache/DeviceState.java
new file mode 100644
index 0000000000000000000000000000000000000000..70995ca5240019c29306e52fca4cf93a4c9eed74
--- /dev/null
+++ b/components/precache/android/java/src/org/chromium/components/precache/DeviceState.java
@@ -0,0 +1,79 @@
+// 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.components.precache;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
+import android.os.BatteryManager;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.base.VisibleForTesting;
+
+/**
+ * Utility class that provides information about the current state of the device.
+ */
+public class DeviceState {
+    private static DeviceState sDeviceState = null;
+
+    /** Disallow Construction of DeviceState objects. Use {@link #getInstance()} instead to create
+     * a singleton instance.
+     */
+    protected DeviceState() {}
+
+    public static DeviceState getInstance() {
+        if (sDeviceState == null) sDeviceState = new DeviceState();
+        return sDeviceState;
+    }
+
+    protected NetworkInfoDelegateFactory mNetworkInfoDelegateFactory =
+            new NetworkInfoDelegateFactory();
+
+    @VisibleForTesting
+    void setNetworkInfoDelegateFactory(NetworkInfoDelegateFactory factory) {
+        mNetworkInfoDelegateFactory = factory;
+    }
+
+    /** @return integer representing the current status of the battery. */
+    @VisibleForTesting
+    int getStickyBatteryStatus(Context context) {
+        IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
+        // Call registerReceiver on context.getApplicationContext(), not on context itself, because
+        // context could be a BroadcastReceiver context, which would throw an
+        // android.content.ReceiverCallNotAllowedException.
+        Intent batteryStatus = context.getApplicationContext().registerReceiver(null, iFilter);
+
+        if (batteryStatus == null) {
+            return BatteryManager.BATTERY_STATUS_UNKNOWN;
+        }
+        return batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS,
+                BatteryManager.BATTERY_STATUS_UNKNOWN);
+    }
+
+    /** @return whether the device is connected to power. */
+    public boolean isPowerConnected(Context context) {
+        int status = getStickyBatteryStatus(context);
+        return status == BatteryManager.BATTERY_STATUS_CHARGING
+                || status == BatteryManager.BATTERY_STATUS_FULL;
+    }
+
+    public boolean isInteractive(Context context) {
+        return ApiCompatibilityUtils.isInteractive(context);
+    }
+
+    /** @return whether the currently active network is Wi-Fi, not roaming, and not metered. */
+    public boolean isWifiAvailable(Context context) {
+        NetworkInfoDelegate networkInfo =
+                mNetworkInfoDelegateFactory.getNetworkInfoDelegate(context);
+        return (networkInfo.isValid()
+                && networkInfo.getType() == ConnectivityManager.TYPE_WIFI
+                && networkInfo.isAvailable()
+                && networkInfo.isConnected()
+                && !networkInfo.isRoaming()
+                && !networkInfo.isActiveNetworkMetered());
+    }
+}
+