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

chrome/browser/chromeos/login/helper.h

Index: chrome/browser/chromeos/login/helper.h
diff --git a/chrome/browser/chromeos/login/helper.h b/chrome/browser/chromeos/login/helper.h
index de65bcd205f727bc7f4c65799829df8c93af565a..f10ef0af83400ca26c900fb25c514d00a463f96a 100644
--- a/chrome/browser/chromeos/login/helper.h
+++ b/chrome/browser/chromeos/login/helper.h
@@ -20,6 +20,7 @@ class Size;
 
 namespace views {
 class Label;
+class MenuButton;
 class Painter;
 class Textfield;
 class Throbber;
@@ -44,6 +45,9 @@ gfx::Rect CalculateScreenBounds(const gfx::Size& size);
 // Corrects font size for Label control.
 void CorrectLabelFontSize(views::Label* label);
 
+// Corrects font size for MenuButton control.
+void CorrectMenuButtonFontSize(views::MenuButton* button);
+
 // Corrects font size for NativeButton control.
 void CorrectNativeButtonFontSize(views::NativeButton* button);