Add test cases for panel overflow handling.

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 34828f7a1cf24003b9e8df2bb65b1196c80bd25c..7619a6d0b107e7c64669de2e4ec61c022b37764e 100644
--- a/chrome/browser/ui/panels/base_panel_browser_test.cc
+++ b/chrome/browser/ui/panels/base_panel_browser_test.cc
@@ -11,11 +11,13 @@
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
+#include "base/string_number_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
+#include "chrome/browser/ui/panels/panel_mouse_watcher.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
@@ -151,7 +153,7 @@ void MockAutoHidingDesktopBarImpl::NotifyThicknessChange() {
 }
 
 bool ExistsPanel(Panel* panel) {
-  const PanelManager::Panels& panels = PanelManager::GetInstance()->panels();
+  std::vector<Panel*> panels = PanelManager::GetInstance()->panels();
   return find(panels.begin(), panels.end(), panel) != panels.end();
 }
 
@@ -379,3 +381,25 @@ scoped_refptr<Extension> BasePanelBrowserTest::CreateExtension(
       OnExtensionInstalled(extension.get(), false, -1);
   return extension;
 }
+
+void BasePanelBrowserTest::CloseWindowAndWait(Browser* browser) {
+  // Closing a browser window may involve several async tasks. Need to use
+  // message pump and wait for the notification.
+  size_t browser_count = BrowserList::size();
+  ui_test_utils::WindowedNotificationObserver signal(
+      chrome::NOTIFICATION_BROWSER_CLOSED,
+      content::Source<Browser>(browser));
+  browser->CloseWindow();
+  signal.Wait();
+  // Now we have one less browser instance.
+  EXPECT_EQ(browser_count - 1, BrowserList::size());
+}
+
+void BasePanelBrowserTest::MoveMouse(const gfx::Point& position) {
+  PanelManager::GetInstance()->mouse_watcher()->NotifyMouseMovement(position);
+}
+
+std::string BasePanelBrowserTest::MakePanelName(int index) {
+  std::string panel_name("Panel");
+  return panel_name + base::IntToString(index);
+}