Place the spinner in the right corner of the controls window.

chrome/browser/chromeos/login/helper.h

Index: chrome/browser/chromeos/login/helper.h
diff --git a/chrome/browser/chromeos/login/helper.h b/chrome/browser/chromeos/login/helper.h
index 0ecfe4f94618dca3df2baf629b3b32a794d9474f..1c3851ac530d26e72d3af91895c80e6e11ea5cd6 100644
--- a/chrome/browser/chromeos/login/helper.h
+++ b/chrome/browser/chromeos/login/helper.h
@@ -8,8 +8,10 @@
 #define CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_
 #pragma once
 
-#include "views/controls/button/native_button.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "views/controls/button/native_button.h"
+#include "views/view.h"
+#include "views/widget/widget_gtk.h"
 
 class GURL;
 
@@ -22,14 +24,49 @@ namespace views {
 class Label;
 class MenuButton;
 class Painter;
+class SmoothedThrobber;
 class Textfield;
 class Throbber;
+class Widget;
 }  // namespace views
 
 namespace chromeos {
 
+// View that provides interface for start/stop throbber above the view.
+class ThrobberHostView : public views::View {
+ public:
+  ThrobberHostView();
+  virtual ~ThrobberHostView();
+
+  // Creates throbber above the view in the right side with the default
+  // margin. Also places throbber in the middle of the vertical host size.
+  // Override |CalculateThrobberBounds| method to change the throbber placing.
+  virtual void StartThrobber();
+
+  // Stops the throbber.
+  virtual void StopThrobber();
+
+ protected:
+  // Calculates the bounds of the throbber relatively to the host view.
+  // Default position is vertically centered right side of the host view.
+  virtual gfx::Rect CalculateThrobberBounds(views::Throbber* throbber);
+
+  void set_host_view(views::View* host_view) {
+    host_view_ = host_view;
+  }
+
+ private:
+  // View to show the throbber above (default is |this|).
+  views::View* host_view_;
+
+  // Popup that contains the throbber.
+  views::Widget* throbber_widget_;
+
+  DISALLOW_COPY_AND_ASSIGN(ThrobberHostView);
+};
+
 // Creates default smoothed throbber for time consuming operations on login.
-views::Throbber* CreateDefaultSmoothedThrobber();
+views::SmoothedThrobber* CreateDefaultSmoothedThrobber();
 
 // Creates default throbber.
 views::Throbber* CreateDefaultThrobber();
@@ -81,6 +118,9 @@ const SkColor kTextColor = SK_ColorWHITE;
 // Default link color on login/OOBE controls.
 const SkColor kLinkColor = 0xFF0066CC;
 
+// Right margin for placing throbber above the view.
+const int kThrobberRightMargin = 10;
+
 // Default size of the OOBE screen. Includes 10px shadow from each side.
 // See rounded_rect_painter.cc for border definitions.
 const int kWizardScreenWidth = 800;