Revert "In components/autofill, move common/ to shared/"

components/autofill/shared/autofill_constants.cc

Index: components/autofill/shared/autofill_constants.cc
diff --git a/components/autofill/shared/autofill_constants.cc b/components/autofill/shared/autofill_constants.cc
deleted file mode 100644
index 359d567e2029c8cf27b6c2a22ce7378d50f79e48..0000000000000000000000000000000000000000
--- a/components/autofill/shared/autofill_constants.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2013 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 "components/autofill/shared/autofill_constants.h"
-
-#include "build/build_config.h"
-
-namespace autofill {
-
-const char kHelpURL[] =
-#if defined(OS_CHROMEOS)
-    "https://support.google.com/chromeos/?p=settings_autofill";
-#else
-    "https://support.google.com/chrome/?p=settings_autofill";
-#endif
-
-const size_t kRequiredAutofillFields = 3;
-
-}  // namespace autofill