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

chrome/browser/chromeos/login/textfield_with_margin.cc

Index: chrome/browser/chromeos/login/textfield_with_margin.cc
diff --git a/chrome/browser/chromeos/login/textfield_with_margin.cc b/chrome/browser/chromeos/login/textfield_with_margin.cc
index 7f8edd2dbb3f617d6be24ebe2b3aade68c7d3f64..8ad4cee430ef64c097cf88b9520194f3e0f44749 100644
--- a/chrome/browser/chromeos/login/textfield_with_margin.cc
+++ b/chrome/browser/chromeos/login/textfield_with_margin.cc
@@ -9,13 +9,20 @@ 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();
 }