Added text filtering to Overview Mode

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index cb3e5423814432168664c60ec7a6ce84ce167ebc..d0f2d6c8f31e08495c5df42d8d4e4112aef02dfd 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -601,7 +601,7 @@ bool Textfield::OnMousePressed(const ui::MouseEvent& event) {
             ui::Clipboard::GetForCurrentThread(),
             ui::CLIPBOARD_TYPE_SELECTION).WriteText(base::string16());
         OnAfterUserAction();
-      } else if(!read_only()) {
+      } else if (!read_only()) {
         PasteSelectionClipboard(event);
       }
     }
@@ -647,8 +647,14 @@ void Textfield::OnMouseReleased(const ui::MouseEvent& event) {
 }
 
 bool Textfield::OnKeyPressed(const ui::KeyEvent& event) {
+  // Since HandleKeyEvent() might destroy |this|, get a weak pointer and verify
+  // it isn't null before proceeding.
+  base::WeakPtr<Textfield> textfield(weak_ptr_factory_.GetWeakPtr());
   bool handled = controller_ && controller_->HandleKeyEvent(this, event);
 
+  if (!textfield)
+    return handled;
+
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   ui::TextEditKeyBindingsDelegateAuraLinux* delegate =
       ui::GetTextEditKeyBindingsDelegate();
@@ -1588,6 +1594,8 @@ void Textfield::PaintTextAndCursor(gfx::Canvas* canvas) {
   // Draw the text, cursor, and selection.
   render_text->set_cursor_visible(cursor_visible_ && !drop_cursor_visible_ &&
                                   !HasSelection());
+  render_text->set_shadows(shadows_);
+
   render_text->Draw(canvas);
 
   // Draw the detached drop cursor that marks where the text will be dropped.