Remove linked_ptr from components/policy/*

Use std::unique_ptr instead of deprecated linked_ptr

Bug: 556939
Change-Id: Iefb3dcb3ae891fe4b0fd0dd70be408517bcd9d85
Reviewed-on: https://chromium-review.googlesource.com/1034942Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Sungguk Lim <limasdf@gmail.com>
Cr-Commit-Position: refs/heads/master@{#555303}

components/policy/core/common/remote_commands/remote_commands_queue.cc

@@ -35,7 +35,7 @@ void RemoteCommandsQueue::RemoveObserver(Observer* observer) {
 }
 
 void RemoteCommandsQueue::AddJob(std::unique_ptr<RemoteCommandJob> job) {
-  incoming_commands_.push(linked_ptr<RemoteCommandJob>(job.release()));
+  incoming_commands_.emplace(std::move(job));
 
   if (!running_command_)
     ScheduleNextJob();
@@ -74,7 +74,7 @@ void RemoteCommandsQueue::ScheduleNextJob() {
     return;
   DCHECK(!execution_timeout_timer_.IsRunning());
 
-  running_command_.reset(incoming_commands_.front().release());
+  running_command_ = std::move(incoming_commands_.front());
   incoming_commands_.pop();
 
   execution_timeout_timer_.Start(FROM_HERE,

components/policy/core/common/remote_commands/remote_commands_queue.h

@@ -9,7 +9,6 @@
 
 #include "base/containers/queue.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "components/policy/policy_export.h"
@@ -72,7 +71,7 @@ class POLICY_EXPORT RemoteCommandsQueue {
   // Attempts to start a new command.
   void ScheduleNextJob();
 
-  base::queue<linked_ptr<RemoteCommandJob>> incoming_commands_;
+  base::queue<std::unique_ptr<RemoteCommandJob>> incoming_commands_;
 
   std::unique_ptr<RemoteCommandJob> running_command_;