Add kApplicationIdKey for ShellSurface::GetApplicationId and SetApplicationId

chrome/browser/memory/tab_manager_delegate_chromeos.cc

Index: chrome/browser/memory/tab_manager_delegate_chromeos.cc
diff --git a/chrome/browser/memory/tab_manager_delegate_chromeos.cc b/chrome/browser/memory/tab_manager_delegate_chromeos.cc
index 39a0f0cb50049b8a70f0d4c4847fb22da97faa94..57da59a6c4d244bffb1c0f29cc3b905ce91d7036 100644
--- a/chrome/browser/memory/tab_manager_delegate_chromeos.cc
+++ b/chrome/browser/memory/tab_manager_delegate_chromeos.cc
@@ -75,8 +75,10 @@ aura::client::ActivationClient* GetActivationClient() {
 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);
 }