Move IN_OVERFLOW from Panel::ExpansionState to new enum.

chrome/browser/ui/panels/base_panel_browser_test.cc

Index: chrome/browser/ui/panels/base_panel_browser_test.cc
diff --git a/chrome/browser/ui/panels/base_panel_browser_test.cc b/chrome/browser/ui/panels/base_panel_browser_test.cc
index 5abb51a8347ad7adc0b629cc0acb7d7e7dde301d..5296187ac95bd657a7a3d599a8aaac7ac90704a9 100644
--- a/chrome/browser/ui/panels/base_panel_browser_test.cc
+++ b/chrome/browser/ui/panels/base_panel_browser_test.cc
@@ -261,6 +261,17 @@ void BasePanelBrowserTest::WaitForBoundsAnimationFinished(Panel* panel) {
   EXPECT_TRUE(!panel_testing->IsAnimatingBounds());
 }
 
+void BasePanelBrowserTest::WaitForStripOwnerChanged(
+    Panel* panel, Panel::StripOwner strip_owner) {
+  ui_test_utils::WindowedNotificationObserver signal(
+      chrome::NOTIFICATION_PANEL_CHANGED_STRIP_OWNER,
+      content::Source<Panel>(panel));
+  if (panel->strip_owner() == strip_owner)
+    return;
+  signal.Wait();
+  EXPECT_EQ(strip_owner, panel->strip_owner());
+}
+
 void BasePanelBrowserTest::WaitForExpansionStateChanged(
     Panel* panel, Panel::ExpansionState expansion_state) {
   ui_test_utils::WindowedNotificationObserver signal(