Migrate ProcessesEventRouter to the new task manager

chrome/browser/task_management/providers/arc/arc_process_task.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_management/providers/arc/arc_process_task.h"
 
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/arc/arc_bridge_service.h"
+#include "content/public/common/child_process_host.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace task_management {
 
 namespace {
 
 base::string16 MakeTitle(const std::string& process_name) {
   base::string16 title =
       l10n_util::GetStringFUTF16(
           IDS_TASK_MANAGER_ARC_PREFIX, base::UTF8ToUTF16(process_name));
@@ skipping 14 matching lines @@
 
 ArcProcessTask::~ArcProcessTask() {
 }
 
 Task::Type ArcProcessTask::GetType() const {
   return Task::ARC;
 }
 
 int ArcProcessTask::GetChildProcessUniqueID() const {
   // ARC process is not a child process of the browser.
-  return 0;
+  return content::ChildProcessHost::kInvalidUniqueID;
 }
 
 void ArcProcessTask::Kill() {
   arc::ProcessInstance* arc_process_instance =
       arc::ArcBridgeService::Get()->process_instance();
   if (!arc_process_instance) {
     LOG(ERROR) << "ARC process instance is not ready.";
     return;
   }
   if (arc::ArcBridgeService::Get()->process_version() < 1) {
     LOG(ERROR) << "ARC KillProcess IPC is unavailable.";
     return;
   }
   arc_process_instance->KillProcess(
       nspid_, "Killed manually from Task Manager");
 }
 
 }  // namespace task_management