Add test cases for panel overflow handling.

chrome/browser/ui/panels/base_panel_browser_test.h

Index: chrome/browser/ui/panels/base_panel_browser_test.h
diff --git a/chrome/browser/ui/panels/base_panel_browser_test.h b/chrome/browser/ui/panels/base_panel_browser_test.h
index b45ff14751bb08c408f2fbd5d1b655531c9ee4e8..641660eb44549de21dbf9d29c5be73095aacf5f8 100644
--- a/chrome/browser/ui/panels/base_panel_browser_test.h
+++ b/chrome/browser/ui/panels/base_panel_browser_test.h
@@ -42,13 +42,15 @@ class BasePanelBrowserTest : public InProcessBrowserTest {
     gfx::Rect bounds;
     ActiveState show_flag;
     GURL url;
+    bool wait_for_fully_created;
 
     CreatePanelParams(const std::string& name,
                       const gfx::Rect& bounds,
                       ActiveState show_flag)
         : name(name),
           bounds(bounds),
-          show_flag(show_flag) {
+          show_flag(show_flag),
+          wait_for_fully_created(true) {
     }
   };
 
@@ -71,6 +73,10 @@ class BasePanelBrowserTest : public InProcessBrowserTest {
                                            Extension::Location location,
                                            const DictionaryValue& extra_value);
 
+  static void MoveMouse(const gfx::Point& position);
+  static void CloseWindowAndWait(Browser* browser);
+  static std::string MakePanelName(int index);
+
   gfx::Rect testing_work_area() const { return testing_work_area_; }
   void set_testing_work_area(const gfx::Rect& work_area) {
     testing_work_area_ = work_area;