Revert of [DevTools] Move DevToolsWindow testing code to a separate class.

chrome/test/base/ui_test_utils.cc

Index: chrome/test/base/ui_test_utils.cc
diff --git a/chrome/test/base/ui_test_utils.cc b/chrome/test/base/ui_test_utils.cc
index 978835bd9958cd22f6f1da1cf3998e8e50da360d..2fa3c021fb5d110942a478f235415f02606188ea 100644
--- a/chrome/test/base/ui_test_utils.cc
+++ b/chrome/test/base/ui_test_utils.cc
@@ -28,6 +28,7 @@
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ -267,6 +268,13 @@
       BROWSER_TEST_WAIT_FOR_NAVIGATION);
 }
 
+void WaitUntilDevToolsWindowLoaded(DevToolsWindow* window) {
+  scoped_refptr<content::MessageLoopRunner> runner =
+      new content::MessageLoopRunner;
+  window->SetLoadCompletedCallback(runner->QuitClosure());
+  runner->Run();
+}
+
 base::FilePath GetTestFilePath(const base::FilePath& dir,
                                const base::FilePath& file) {
   base::FilePath path;