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

chrome/browser/chromeos/login/helper.cc

Index: chrome/browser/chromeos/login/helper.cc
diff --git a/chrome/browser/chromeos/login/helper.cc b/chrome/browser/chromeos/login/helper.cc
index b3905c08153172e1855ebb24ca872284c4275212..1b7ebbaaaeabee35eb8cfcd7dd0c3b05bcfe8b21 100644
--- a/chrome/browser/chromeos/login/helper.cc
+++ b/chrome/browser/chromeos/login/helper.cc
@@ -10,6 +10,7 @@
 #include "googleurl/src/gurl.h"
 #include "grit/theme_resources.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
+#include "views/controls/button/menu_button.h"
 #include "views/controls/button/native_button.h"
 #include "views/controls/label.h"
 #include "views/controls/textfield/textfield.h"
@@ -102,6 +103,11 @@ void CorrectLabelFontSize(views::Label* label) {
     label->SetFont(label->font().DeriveFont(kFontSizeCorrectionDelta));
 }
 
+void CorrectMenuButtonFontSize(views::MenuButton* button) {
+  if (button)
+    button->SetFont(button->font().DeriveFont(kFontSizeCorrectionDelta));
+}
+
 void CorrectNativeButtonFontSize(views::NativeButton* button) {
   if (button)
     button->set_font(button->font().DeriveFont(kFontSizeCorrectionDelta));
@@ -123,6 +129,7 @@ const int kButtonMinWidth = 90;
 
 gfx::Size WideButton::GetPreferredSize() {
   gfx::Size preferred_size = NativeButton::GetPreferredSize();
+  // Set minimal width.
   if (preferred_size.width() < kButtonMinWidth)
     preferred_size.set_width(kButtonMinWidth);
   return preferred_size;