[task_manager] Add ARC process whitelist.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 8991997226384be1cf17bee4213c479a6879a0d2..529fa46a9c2d9029b3438fdd81f869bcdb32d995 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -2215,6 +2215,8 @@ split_static_library("browser") {
       "task_manager/providers/arc/arc_process_task.h",
       "task_manager/providers/arc/arc_process_task_provider.cc",
       "task_manager/providers/arc/arc_process_task_provider.h",
+      "task_manager/providers/arc/arc_process_whitelist.cc",
+      "task_manager/providers/arc/arc_process_whitelist.h",
     ]
     deps += [ "//chrome/browser/chromeos" ]
     public_deps += [