[ios] Adds signin resources and styled text fields to ChromiumBrowserProvider.

ios/chrome/browser/providers/ui/chromium_styled_text_field.h

Index: ios/chrome/browser/providers/ui/chromium_styled_text_field.h
diff --git a/ios/chrome/browser/providers/ui/chromium_styled_text_field.h b/ios/chrome/browser/providers/ui/chromium_styled_text_field.h
new file mode 100644
index 0000000000000000000000000000000000000000..a25d3234b8e089ec721dd857c1e85d7617ecff05
--- /dev/null
+++ b/ios/chrome/browser/providers/ui/chromium_styled_text_field.h
@@ -0,0 +1,18 @@
+// Copyright 2016 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.
+
+#ifndef IOS_CHROME_BROWSER_PROVIDERS_UI_CHROMIUM_STYLED_TEXT_FIELD_H_
+#define IOS_CHROME_BROWSER_PROVIDERS_UI_CHROMIUM_STYLED_TEXT_FIELD_H_
+
+#import "ios/public/provider/chrome/browser/ui/text_field_styling.h"
+
+#import <UIKit/UIKit.h>
+
+// ChromiumStyledTextField does not style the text field or perform text
+// validation, but it provides a barebones implementation of the
+// TextFieldStyling protocol for use in Chromium builds.
+@interface ChromiumStyledTextField : UITextField<TextFieldStyling>
+@end
+
+#endif  // IOS_CHROME_BROWSER_PROVIDERS_UI_CHROMIUM_STYLED_TEXT_FIELD_H_