Reland of 'Move content/browser/power_save_blocker to //device/power_save_blocker'

device/power_save_blocker/android/java/src/org/chromium/device/power_save_blocker/PowerSaveBlocker.java

 // Copyright 2013 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.content.browser;
+package org.chromium.device.power_save_blocker;
 
 import android.view.View;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.ui.base.ViewAndroidDelegate;
 
 import java.lang.ref.WeakReference;
 
-@JNINamespace("content")
+@JNINamespace("device")
 class PowerSaveBlocker {
     // WeakReference to prevent leaks in Android WebView.
     private WeakReference<View> mKeepScreenOnView;
 
     @CalledByNative
     private static PowerSaveBlocker create() {
         return new PowerSaveBlocker();
     }
 
     private PowerSaveBlocker() {}
@@ skipping 11 matching lines @@
     private void removeBlock(ViewAndroidDelegate delegate) {
         assert mKeepScreenOnView != null;
         View anchorView = mKeepScreenOnView.get();
         mKeepScreenOnView = null;
         if (anchorView == null) return;
 
         anchorView.setKeepScreenOn(false);
         delegate.releaseAnchorView(anchorView);
     }
 }