[Mac] Refactor location-bar autocomplete cell classes.

chrome/browser/cocoa/autocomplete_text_field_cell.h

Index: chrome/browser/cocoa/autocomplete_text_field_cell.h
diff --git a/chrome/browser/cocoa/autocomplete_text_field_cell.h b/chrome/browser/cocoa/autocomplete_text_field_cell.h
new file mode 100644
index 0000000000000000000000000000000000000000..983e370087059c53c4ef0ac942224da83d66bb5c
--- /dev/null
+++ b/chrome/browser/cocoa/autocomplete_text_field_cell.h
@@ -0,0 +1,11 @@
+// Copyright (c) 2009 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.
+
+#import <Cocoa/Cocoa.h>
+
+// A cell that draws the autocomplete field.
+
+@interface AutocompleteTextFieldCell : NSTextFieldCell {
+}
+@end