Rename visual style "password" to "obscured"

ui/views/controls/textfield/textfield_views_model.cc

Index: ui/views/controls/textfield/textfield_views_model.cc
diff --git a/ui/views/controls/textfield/textfield_views_model.cc b/ui/views/controls/textfield/textfield_views_model.cc
index ab5a94bf310566853e123a387aff40360dbd8b6b..f530c5a2ac997a2b8e1747b98f1e2a61f2654632 100644
--- a/ui/views/controls/textfield/textfield_views_model.cc
+++ b/ui/views/controls/textfield/textfield_views_model.cc
@@ -281,7 +281,7 @@ TextfieldViewsModel::Delegate::~Delegate() {
 TextfieldViewsModel::TextfieldViewsModel(Delegate* delegate)
     : delegate_(delegate),
       render_text_(gfx::RenderText::CreateRenderText()),
-      is_password_(false),
+      is_obscured_(false),
       current_edit_(edit_history_.end()) {
 }
 
@@ -640,7 +640,7 @@ bool TextfieldViewsModel::HasCompositionText() const {
 
 string16 TextfieldViewsModel::GetVisibleText(size_t begin, size_t end) const {
   DCHECK(end >= begin);
-  if (is_password_)
+  if (is_obscured_)
     return string16(end - begin, '*');
   return GetText().substr(begin, end - begin);
 }