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

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

Index: ios/chrome/browser/providers/ui/chromium_styled_text_field.mm
diff --git a/ios/chrome/browser/providers/ui/chromium_styled_text_field.mm b/ios/chrome/browser/providers/ui/chromium_styled_text_field.mm
new file mode 100644
index 0000000000000000000000000000000000000000..0af91e322fe5344688c6f67402210f237cf899c5
--- /dev/null
+++ b/ios/chrome/browser/providers/ui/chromium_styled_text_field.mm
@@ -0,0 +1,17 @@
+// 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.
+
+#import "ios/chrome/browser/providers/ui/chromium_styled_text_field.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation ChromiumStyledTextField
+@synthesize placeholderStyle = _placeholderStyle;
+@synthesize textValidator = _textValidator;
+
+- (void)setUseErrorStyling:(BOOL)error {
+}
+@end