[cros] Use WideButton for all screens, increase textfield vmargin on login screen.

chrome/browser/chromeos/login/textfield_with_margin.cc

 // Copyright (c) 2010 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 "chrome/browser/chromeos/login/textfield_with_margin.h"
 
 namespace {
 
 // Holds ratio of the margin to the preferred text height.
 const double kTextMarginRate = 0.33;
 
+// Size of each vertical margin (top, bottom).
+const int kVerticalMargin = 3;
+
 }  // namespace
 
 namespace chromeos {
 
+TextfieldWithMargin::TextfieldWithMargin() {
+}
+
 void TextfieldWithMargin::Layout() {
   int margin = GetPreferredSize().height() * kTextMarginRate;
   SetHorizontalMargins(margin, margin);
+  SetVerticalMargins(kVerticalMargin, kVerticalMargin);
   views::Textfield::Layout();
 }
 
 }  // namespace chromeos