Add kApplicationIdKey for ShellSurface::GetApplicationId and SetApplicationId

chrome/browser/memory/tab_manager_delegate_chromeos.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/memory/tab_manager_delegate_chromeos.h"
 
 #include <math.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 57 matching lines @@
 aura::client::ActivationClient* GetActivationClient() {
   if (!ash::Shell::HasInstance())
     return nullptr;
   return aura::client::GetActivationClient(ash::Shell::GetPrimaryRootWindow());
 }
 
 // Checks if a window renders ARC apps.
 bool IsArcWindow(aura::Window* window) {
   if (!window || window->GetName() != kExoShellSurfaceWindowName)
     return false;
-  std::string application_id = exo::ShellSurface::GetApplicationId(window);

[Yusuke Sato, 2017/05/19 16:55:28]

FYI the code has been removed:
https://codereview.chromium.org/2877883002/

[yawano, 2017/05/22 07:33:19]

Thank you for letting me know about this! Rebased this CL.

-  return base::StartsWith(application_id, kArcProcessNamePrefix,
+  const std::string* application_id =
+      exo::ShellSurface::GetApplicationId(window);
+  return application_id &&
+         base::StartsWith(*application_id, kArcProcessNamePrefix,
                           base::CompareCase::SENSITIVE);
 }
 
 bool IsArcMemoryManagementEnabled() {
   return base::FeatureList::IsEnabled(features::kArcMemoryManagement);
 }
 
 void OnSetOomScoreAdj(bool success, const std::string& output) {
   VLOG(2) << "OnSetOomScoreAdj " << success << " " << output;
   if (!success)
@@ skipping 680 matching lines @@
     priority += priority_increment;
   }
 
   if (oom_scores_to_change.size()) {
     GetDebugDaemonClient()->SetOomScoreAdj(
         oom_scores_to_change, base::Bind(&OnSetOomScoreAdj));
   }
 }
 
 }  // namespace memory