Make Panel tests faster by reducing time intervals in tests.

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..d86ff48e82f3e35a52bd498d7def9ca85820dc0e 100644
--- a/chrome/browser/ui/panels/base_panel_browser_test.cc
+++ b/chrome/browser/ui/panels/base_panel_browser_test.cc
@@ -191,6 +191,8 @@ void BasePanelBrowserTest::SetUpOnMainThread() {
     panel_manager->SetWorkAreaForTesting(testing_work_area_);
   panel_manager->enable_auto_sizing(false);
 
+  PanelManager::shorten_time_intervals_for_testing();
+
   // This is needed so the subsequently created panels can be activated.
   // On a Mac, it transforms background-only test process into foreground one.
   EXPECT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));