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

device/power_save_blocker/power_save_blocker_impl.cc

Index: device/power_save_blocker/power_save_blocker_impl.cc
diff --git a/content/browser/power_save_blocker_impl.cc b/device/power_save_blocker/power_save_blocker_impl.cc
similarity index 87%
rename from content/browser/power_save_blocker_impl.cc
rename to device/power_save_blocker/power_save_blocker_impl.cc
index 70f536cc1259f0b0b8654445720dbe58e66e5037..c37e6db8c81e75c2a8e2a46a4117c36840b51231 100644
--- a/content/browser/power_save_blocker_impl.cc
+++ b/device/power_save_blocker/power_save_blocker_impl.cc
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/browser/power_save_blocker_impl.h"
+#include "device/power_save_blocker/power_save_blocker_impl.h"
 
 #include "build/build_config.h"
 
-namespace content {
+namespace device {
 
 PowerSaveBlocker::~PowerSaveBlocker() {}
 
@@ -21,4 +21,4 @@ std::unique_ptr<PowerSaveBlocker> PowerSaveBlocker::CreateWithTaskRunners(
       type, reason, description, ui_task_runner, blocking_task_runner));
 }
 
-}  // namespace content
+}  // namespace device