Add spinner UI to show bluetooth is discovering devices.

ui/views/controls/throbber.cc

Index: ui/views/controls/throbber.cc
diff --git a/ui/views/controls/throbber.cc b/ui/views/controls/throbber.cc
index 75d70fbfafc1053c24c302f03721160eea905867..6c576223844121f25cea9830aaa79038982e328c 100644
--- a/ui/views/controls/throbber.cc
+++ b/ui/views/controls/throbber.cc
@@ -21,7 +21,8 @@ Throbber::Throbber(int frame_time_ms,
     : running_(false),
       paint_while_stopped_(paint_while_stopped),
       frames_(NULL),
-      frame_time_(TimeDelta::FromMilliseconds(frame_time_ms)) {
+      frame_time_(TimeDelta::FromMilliseconds(frame_time_ms)),
+      interactive_(true) {
   SetFrames(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
       IDR_THROBBER).ToImageSkia());
 }
@@ -88,7 +89,9 @@ void Throbber::OnPaint(gfx::Canvas* canvas) {
                        false);
 }
 
-
+bool Throbber::HitTestRect(const gfx::Rect& rect) const {
+  return interactive_ ? View::HitTestRect(rect) : false;

[sky, 2013/02/05 15:58:52]

Why do you need this? Rather than adding set_interactive can't you use
set_enabled?

[jennyz, 2013/02/05 17:37:20]

Yes, you are right, I can just use set_enabled, removed set_interactive. Thanks!

+}
 
 // Smoothed throbber ---------------------------------------------------------