Move //chromeos/constants to //ash/constants

Moving the actual target was the only thing left to do.

This CL is part of the Chrome OS source code directory migration:
https://docs.google.com/document/d/1g-98HpzA8XcoGBWUv1gQNr4rbnD5yfvbtYZyPDDbkaE.

No-Presubmit: true
Bug: 1164001
Change-Id: I7b9dfc39c236e41d28b27def6a14910dbe8f3834
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2666133
Commit-Queue: Henrique Ferreiro <[email protected]>
Reviewed-by: James Cook <[email protected]>
Owners-Override: James Cook <[email protected]>
Cr-Commit-Position: refs/heads/master@{#851442}
diff --git a/components/exo/BUILD.gn b/components/exo/BUILD.gn
index d3ee1e9..a0ede21 100644
--- a/components/exo/BUILD.gn
+++ b/components/exo/BUILD.gn
@@ -124,9 +124,9 @@
   if (is_chromeos_ash) {
     deps += [
       "//ash",
+      "//ash/constants",
       "//ash/keyboard/ui",
       "//ash/public/cpp",
-      "//chromeos/constants",
       "//chromeos/crosapi/cpp",
       "//chromeos/ui/base",
       "//chromeos/ui/frame",
@@ -311,11 +311,11 @@
     deps += [
       "//ash",
       "//ash:test_support",
+      "//ash/constants",
       "//ash/keyboard/ui",
       "//ash/public/cpp",
       "//ash/public/cpp/external_arc",
       "//build:chromeos_buildflags",
-      "//chromeos/constants",
       "//chromeos/ui/base",
       "//chromeos/ui/frame",
       "//ui/base:test_support",