Ensures the first browser in each interactive_ui_test is in the foreground

chrome/test/base/in_process_browser_test.h

Index: chrome/test/base/in_process_browser_test.h
diff --git a/chrome/test/base/in_process_browser_test.h b/chrome/test/base/in_process_browser_test.h
index ae3d8e9c57a5ef4c1daaf139ca6b89195d17e558..d73e8d3ff71042fbd1a14d2a47f72ac0e222fef1 100644
--- a/chrome/test/base/in_process_browser_test.h
+++ b/chrome/test/base/in_process_browser_test.h
@@ -118,6 +118,17 @@ class InProcessBrowserTest : public content::BrowserTestBase {
   // Restores state configured in SetUp.
   void TearDown() override;
 
+  using SetUpBrowserFunction = bool(const Browser*);
+
+  // Sets a function that is called from InProcessBrowserTest::SetUp() with the
+  // first browser. This is intended to set up state applicable to all tests
+  // in the suite. For example, interactive_ui_tests installs a function that
+  // ensures the first browser is in the foreground, active and has focus.
+  static void set_global_browser_set_up_function(
+      SetUpBrowserFunction* set_up_function) {
+    global_browser_set_up_function_ = set_up_function;
+  }
+
  protected:
   // Returns the browser created by CreateBrowser.
   Browser* browser() const { return browser_; }
@@ -234,6 +245,8 @@ class InProcessBrowserTest : public content::BrowserTestBase {
   // Quits all open browsers and waits until there are no more browsers.
   void QuitBrowsers();
 
+  static SetUpBrowserFunction* global_browser_set_up_function_;
+
   // Browser created from CreateBrowser.
   Browser* browser_;