Fix bug 141013: OldPanelBrowserTest.CheckDockedPanelProperties is flaky

chrome/browser/ui/panels/old_base_panel_browser_test.cc

Index: chrome/browser/ui/panels/old_base_panel_browser_test.cc
diff --git a/chrome/browser/ui/panels/old_base_panel_browser_test.cc b/chrome/browser/ui/panels/old_base_panel_browser_test.cc
index 270fb746578c8d37b8d0e734fa5ed729e69864c0..96aef3481f89115229d689830cce53c819fec4f0 100644
--- a/chrome/browser/ui/panels/old_base_panel_browser_test.cc
+++ b/chrome/browser/ui/panels/old_base_panel_browser_test.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/panel_mouse_watcher.h"
 #include "chrome/browser/ui/panels/test_panel_active_state_observer.h"
+#include "chrome/browser/ui/panels/test_panel_mouse_watcher.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
@@ -239,6 +240,11 @@ void OldBasePanelBrowserTest::SetUpOnMainThread() {
 
   PanelManager::shorten_time_intervals_for_testing();
 
+  // Simulate the mouse movement so that tests are not affected by actual mouse
+  // events.
+  PanelMouseWatcher* mouse_watcher = new TestPanelMouseWatcher();
+  panel_manager->SetMouseWatcherForTesting(mouse_watcher);
+
   // This is needed so the subsequently created panels can be activated.
   // On a Mac, it transforms background-only test process into foreground one.
   ASSERT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));