[task_manager] Add ARC process whitelist.

chrome/browser/task_manager/providers/arc/arc_process_task_provider.cc

 // 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.
 
 #include "chrome/browser/task_manager/providers/arc/arc_process_task_provider.h"
 
 #include <stddef.h>
 
 #include <queue>
 #include <set>
@@ skipping 42 matching lines @@
 
   // NB: |processes| can be already stale here because it is sent via IPC, and
   // we can never avoid that. See also the comment at the declaration of
   // ArcProcessTaskProvider.
 
   set<ProcessId> nspid_to_remove;
   for (const auto& entry : *pid_to_task)
     nspid_to_remove.insert(entry.first);
 
   for (const auto& entry : processes) {
+    // Skip adding or updating processes we will not display.
+    if (!process_filter_.ShouldDisplayProcess(entry))
+      continue;
+
     if (nspid_to_remove.erase(entry.nspid()) == 0) {
       // New arc process.
       std::unique_ptr<ArcProcessTask>& task = (*pid_to_task)[entry.nspid()];
       // After calling NotifyObserverTaskAdded(), the raw pointer of |task| is
       // remebered somewhere else. One should not (implicitly) delete the
       // referenced object before calling NotifyObserverTaskRemoved() first
       // (crbug.com/587707).
       DCHECK(!task.get()) <<
           "Task with the same pid should not be added twice.";
       task.reset(new ArcProcessTask(entry.pid(), entry.nspid(),
@@ skipping 83 matching lines @@
 }
 
 void ArcProcessTaskProvider::ScheduleNextSystemRequest() {
   ScheduleNextRequest(
       base::Bind(&ArcProcessTaskProvider::RequestSystemProcessList,
                  weak_ptr_factory_.GetWeakPtr()),
       kUpdateSystemProcessListDelaySeconds);
 }
 
 }  // namespace task_manager