Fail tests that use ClickOnView() on an inactive window.

chrome/test/base/interactive_test_utils_views.cc

Index: chrome/test/base/interactive_test_utils_views.cc
diff --git a/chrome/test/base/interactive_test_utils_views.cc b/chrome/test/base/interactive_test_utils_views.cc
index f1dce9d43b99783713733b025068094f8ecd83c7..c1cb74bbe47ac381941cb19d431045835d26209b 100644
--- a/chrome/test/base/interactive_test_utils_views.cc
+++ b/chrome/test/base/interactive_test_utils_views.cc
@@ -6,7 +6,9 @@
 
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
+#include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/focus/focus_manager.h"
 
 namespace ui_test_utils {
@@ -27,6 +29,10 @@ bool IsViewFocused(const Browser* browser, ViewID vid) {
 void ClickOnView(const Browser* browser, ViewID vid) {
   views::View* view =
       BrowserView::GetBrowserViewForBrowser(browser)->GetViewByID(vid);
+  // Fail tests that use ClickOnView() on an inactive window. Tests that do will
+  // flake too easily.
+  EXPECT_TRUE(browser->window()->IsActive())
+      << "ClickOnView() in an inactive window is not robust.";
   DCHECK(view);
   MoveMouseToCenterAndPress(view, ui_controls::LEFT,
                             ui_controls::DOWN | ui_controls::UP,