Ensures the first browser in each interactive_ui_test is in the foreground

chrome/test/base/in_process_browser_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/base/in_process_browser_test.h"
 
 #include "ash/common/ash_switches.h"
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 75 matching lines @@
 #include "chrome/test/base/default_ash_event_generator_delegate.h"
 #endif
 
 namespace {
 
 // Passed as value of kTestType.
 const char kBrowserTestType[] = "browser";
 
 }  // namespace
 
+// static
+InProcessBrowserTest::SetUpBrowserFunction*
+    InProcessBrowserTest::global_browser_set_up_function_ = nullptr;
+
 // Library used for testing accessibility.
 const base::FilePath::CharType kAXSTesting[] =
     FILE_PATH_LITERAL("third_party/accessibility-audit/axs_testing.js");
 // JavaScript snippet to configure and run the accessibility audit.
 const char kAccessibilityTestString[] =
     "var config = new axs.AuditConfiguration();"
     "/* Disable warning about rules that cannot be checked. */"
     "config.showUnsupportedRulesWarning = false;"
     "config.auditRulesToIgnore = ["
     "  /*"
@@ skipping 422 matching lines @@
 
   // Pump any pending events that were created as a result of creating a
   // browser.
   content::RunAllPendingInMessageLoop();
 
   // run_accessibility_checks_for_test_case_ must be set before calling
   // SetUpOnMainThread or RunTestOnMainThread so that one or all tests can
   // enable/disable the accessibility audit.
   run_accessibility_checks_for_test_case_ = false;
 
+  if (browser_ && global_browser_set_up_function_)
+    ASSERT_TRUE(global_browser_set_up_function_(browser_));
+
   SetUpOnMainThread();
 #if defined(OS_MACOSX)
   autorelease_pool_->Recycle();
 #endif
 
   if (!HasFatalFailure())
     RunTestOnMainThread();
 #if defined(OS_MACOSX)
   autorelease_pool_->Recycle();
 #endif
@@ skipping 43 matching lines @@
   // On the Mac, this eventually reaches
   // -[BrowserWindowController windowWillClose:], which will post a deferred
   // -autorelease on itself to ultimately destroy the Browser object. The line
   // below is necessary to pump these pending messages to ensure all Browsers
   // get deleted.
   content::RunAllPendingInMessageLoop();
   delete autorelease_pool_;
   autorelease_pool_ = NULL;
 #endif
 }