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

device/power_save_blocker/power_save_blocker_jni_registrar.h

Index: device/power_save_blocker/power_save_blocker_jni_registrar.h
diff --git a/device/power_save_blocker/power_save_blocker_jni_registrar.h b/device/power_save_blocker/power_save_blocker_jni_registrar.h
new file mode 100644
index 0000000000000000000000000000000000000000..7e05d366d4d3a0b391a99a0cb96af4f94495cfa4
--- /dev/null
+++ b/device/power_save_blocker/power_save_blocker_jni_registrar.h
@@ -0,0 +1,24 @@
+// 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.
+
+#ifndef DEVICE_POWER_SAVE_BLOCKER_ANDROID_POWER_SAVE_BLOCKER_JNI_REGISTRAR_H_
+#define DEVICE_POWER_SAVE_BLOCKER_ANDROID_POWER_SAVE_BLOCKER_JNI_REGISTRAR_H_
+
+#include <jni.h>
+
+#include "device/power_save_blocker/power_save_blocker_export.h"
+
+namespace device {
+namespace android {
+
+// Registers C++ methods in device/power_save_blocker classes with JNI.
+// See https://www.chromium.org/developers/design-documents/android-jni
+//
+// Must be called before classes in the Bluetooth module are used.
+DEVICE_POWER_SAVE_BLOCKER_EXPORT bool RegisterPowerSaveBlockerJni(JNIEnv* env);
+
+}  // namespace android
+}  // namespace device
+
+#endif  // DEVICE_POWER_SAVE_BLOCKER_ANDROID_POWER_SAVE_BLOCKER_JNI_REGISTRAR_H_