[task_manager] Add ARC process whitelist.

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

+// Copyright 2017 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_whitelist.h"
+
+#include "components/arc/common/process.mojom.h"
+
+namespace task_manager {
+
+namespace {
+
+const char* kDefaultWhitelist[] = {"/system/bin/surfaceflinger"};
+}

[Luis Héctor Chávez, 2017/01/24 17:09:41]

nit: // namespace

(also, add a blank line above).

[Eliot Courtney, 2017/01/25 02:08:12]

Done.

+
+ArcProcessWhitelist::ArcProcessWhitelist()
+    : whitelist_(std::begin(kDefaultWhitelist), std::end(kDefaultWhitelist)) {}
+
+ArcProcessWhitelist::ArcProcessWhitelist(std::set<std::string>&& whitelist)
+    : whitelist_(whitelist) {}
+
+ArcProcessWhitelist::~ArcProcessWhitelist() = default;
+
+bool ArcProcessWhitelist::ShouldDisplayProcess(
+    const arc::ArcProcess& process) const {
+  // Check the explicit whitelist. If it is not in there, decide based on its
+  // ProcessState.
+  if (whitelist_.count(process.process_name()))
+    return true;
+  switch (process.process_state()) {
+    case arc::mojom::ProcessState::TOP:  // Fallthrough.
+    case arc::mojom::ProcessState::IMPORTANT_FOREGROUND:
+    case arc::mojom::ProcessState::TOP_SLEEPING:
+      return true;
+    default:
+      break;
+  }
+  return false;
+}
+
+}  // namespace task_manager