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..dc48cf72934dd6d29c50c04c82d01e7726826584 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -268,6 +268,7 @@ Textfield::Textfield()
       performing_user_action_(false),
       skip_input_method_cancel_composition_(false),
       cursor_visible_(false),
+      has_shadow_(false),
       drop_cursor_visible_(false),
       initiating_drag_(false),
       aggregated_clicks_(0),
@@ -431,6 +432,11 @@ void Textfield::UseDefaultSelectionBackgroundColor() {
   SchedulePaint();
 }
 
+void Textfield::SetHasShadow(bool has_shadow) {
+  has_shadow_ = has_shadow;
+  SchedulePaint();
+}
+
 bool Textfield::GetCursorEnabled() const {
   return GetRenderText()->cursor_enabled();
 }
@@ -647,8 +653,12 @@ void Textfield::OnMouseReleased(const ui::MouseEvent& event) {
 }
 
 bool Textfield::OnKeyPressed(const ui::KeyEvent& event) {
+  base::WeakPtr<Textfield> textfield(weak_ptr_factory_.GetWeakPtr());

[flackr, 2014/06/26 17:33:08]

nit: Might be worth a comment that HandleKeyEvent may delete |this|.

[Nina, 2014/06/27 15:20:39]

Done.

   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 +1598,14 @@ void Textfield::PaintTextAndCursor(gfx::Canvas* canvas) {
   // Draw the text, cursor, and selection.
   render_text->set_cursor_visible(cursor_visible_ && !drop_cursor_visible_ &&
                                   !HasSelection());
+
+  if (has_shadow_) {
+    // Draw a basic shadow underneath the text.
+    gfx::ShadowValues shadows;
+    shadows.push_back(gfx::ShadowValue(gfx::Point(0, 1), 10, SK_ColorBLACK));

[flackr, 2014/06/26 17:33:08]

Maybe we should pass the ShadowValues in when setting a shadow so this shadow
support works for any kind of shadow.

+    render_text->set_shadows(shadows);
+  }
+
   render_text->Draw(canvas);
 
   // Draw the detached drop cursor that marks where the text will be dropped.