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

chrome/browser/chromeos/login/helper.cc

Index: chrome/browser/chromeos/login/helper.cc
diff --git a/chrome/browser/chromeos/login/helper.cc b/chrome/browser/chromeos/login/helper.cc
index 1b7ebbaaaeabee35eb8cfcd7dd0c3b05bcfe8b21..343bfae83db1d694e2a3f6df3852b7f2e67346df 100644
--- a/chrome/browser/chromeos/login/helper.cc
+++ b/chrome/browser/chromeos/login/helper.cc
@@ -17,6 +17,7 @@
 #include "views/controls/throbber.h"
 #include "views/painter.h"
 #include "views/screen.h"
+#include "views/widget/widget.h"
 
 namespace chromeos {
 
@@ -67,6 +68,52 @@ class BackgroundPainter : public views::Painter {
 
 }  // namespace
 
+ThrobberManager::ThrobberManager() : throbber_widget_(NULL) {
+}
+
+ThrobberManager::~ThrobberManager() {
+  StopAndClose();
+}
+
+void ThrobberManager::CreateAndStart(views::Widget* host,
+                                     views::Throbber* throbber,
+                                     int right_margin) {
+  gfx::Rect host_bounds;
+  host->GetBounds(&host_bounds, false);
+  gfx::Rect bounds(throbber->GetPreferredSize());
+  bounds.set_x(host_bounds.width() - right_margin - bounds.width());
+  bounds.set_y((host_bounds.height() - bounds.height()) / 2);
+  CreateAndStart(host, throbber, bounds);
+}
+
+void ThrobberManager::CreateAndStart(views::Widget* host,
+                                     views::Throbber* throbber,
+                                     const gfx::Rect& relative_bounds) {
+  // Close the previously opened throbber (if any).
+  StopAndClose();
+
+  throbber_widget_ =
+      views::Widget::CreatePopupWidget(views::Widget::Transparent,
+                                       views::Widget::NotAcceptEvents,
+                                       views::Widget::DeleteOnDestroy,
+                                       views::Widget::DontMirrorOriginInRTL);
+  gfx::Rect host_bounds;
+  host->GetBounds(&host_bounds, false);
+  gfx::Rect bounds = relative_bounds;
+  bounds.Offset(host_bounds.origin());
+  throbber_widget_->InitWithWidget(host, bounds);
+  throbber_widget_->SetContentsView(throbber);
+  throbber_widget_->Show();
+  throbber->Start();
+}
+
+void ThrobberManager::StopAndClose() {
+  if (throbber_widget_) {
+    throbber_widget_->Close();
+    throbber_widget_ = NULL;
+  }
+}
+
 views::Throbber* CreateDefaultSmoothedThrobber() {
   views::SmoothedThrobber* throbber =
       new views::SmoothedThrobber(kThrobberFrameMs);
@@ -138,4 +185,3 @@ gfx::Size WideButton::GetPreferredSize() {
 }  // namespace login
 
 }  // namespace chromeos
-