Allow WebUI Tests to use preLoad in HtmlDialogUI.

chrome/browser/ui/webui/web_ui_browsertest.cc

Index: chrome/browser/ui/webui/web_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/web_ui_browsertest.cc b/chrome/browser/ui/webui/web_ui_browsertest.cc
index 9049fd897685f0f050987e350f05df930107f0d8..0d5dba215e0577fccc8fc69df2b6b26c028a7b27 100644
--- a/chrome/browser/ui/webui/web_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/web_ui_browsertest.cc
@@ -175,13 +175,7 @@ void WebUIBrowserTest::PreLoadJavascriptLibraries(
   libraries_preloaded_ = true;
 }
 
-void WebUIBrowserTest::BrowsePreload(const GURL& browse_to,
-                                     const std::string& preload_test_fixture,
-                                     const std::string& preload_test_name) {
-  // Remember for callback OnJsInjectionReady().
-  preload_test_fixture_ = preload_test_fixture;
-  preload_test_name_ = preload_test_name;
-
+void WebUIBrowserTest::BrowsePreload(const GURL& browse_to) {
   TestNavigationObserver navigation_observer(
       content::Source<NavigationController>(
           &browser()->GetSelectedTabContentsWrapper()->controller()),
@@ -193,14 +187,7 @@ void WebUIBrowserTest::BrowsePreload(const GURL& browse_to,
   navigation_observer.WaitForObservation();
 }
 
-void WebUIBrowserTest::BrowsePrintPreload(
-    const GURL& browse_to,
-    const std::string& preload_test_fixture,
-    const std::string& preload_test_name) {
-  // Remember for callback OnJsInjectionReady().
-  preload_test_fixture_ = preload_test_fixture;
-  preload_test_name_ = preload_test_name;
-
+void WebUIBrowserTest::BrowsePrintPreload(const GURL& browse_to) {
   ui_test_utils::NavigateToURL(browser(), browse_to);
 
   TestTabStripModelObserver tabstrip_observer(