Move fake_enc/decryption from Chrome to test

(where they should have been from the beginning; placed in Chrome by mistake).

Bug: b:153649905
Change-Id: Iea5a43b7ea4dc553d544977f62177e0a01200eb3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354532
Auto-Submit: Leonid Baraz <lbaraz@chromium.org>
Reviewed-by: Zach Trudo <zatrudo@google.com>
Commit-Queue: Zach Trudo <zatrudo@google.com>
Cr-Commit-Position: refs/heads/master@{#797756}

chrome/browser/BUILD.gn

@@ -1167,10 +1167,6 @@ static_library("browser") {
     "policy/messaging_layer/encryption/encryption.h",
     "policy/messaging_layer/encryption/encryption_module.cc",
     "policy/messaging_layer/encryption/encryption_module.h",
-    "policy/messaging_layer/encryption/fake_decryption.cc",
-    "policy/messaging_layer/encryption/fake_decryption.h",
-    "policy/messaging_layer/encryption/fake_encryption.cc",
-    "policy/messaging_layer/encryption/fake_encryption.h",
     "policy/messaging_layer/public/report_client.cc",
     "policy/messaging_layer/public/report_client.h",
     "policy/messaging_layer/public/report_queue.cc",

chrome/test/BUILD.gn

@@ -3405,6 +3405,10 @@ test("unit_tests") {
     "../browser/policy/file_selection_dialogs_policy_handler_unittest.cc",
     "../browser/policy/homepage_location_policy_handler_unittest.cc",
     "../browser/policy/javascript_policy_handler_unittest.cc",
+    "../browser/policy/messaging_layer/encryption/fake_decryption.cc",
+    "../browser/policy/messaging_layer/encryption/fake_decryption.h",
+    "../browser/policy/messaging_layer/encryption/fake_encryption.cc",
+    "../browser/policy/messaging_layer/encryption/fake_encryption.h",
     "../browser/policy/messaging_layer/encryption/fake_encryption_unittest.cc",
     "../browser/policy/messaging_layer/encryption/test_encryption_module.cc",
     "../browser/policy/messaging_layer/encryption/test_encryption_module.h",