Move about://-related constants from //content to //url

chrome/browser/ui/browser_close_browsertest.cc

Index: chrome/browser/ui/browser_close_browsertest.cc
diff --git a/chrome/browser/ui/browser_close_browsertest.cc b/chrome/browser/ui/browser_close_browsertest.cc
index cbc544c5bf4ed60cb915b8ce99500c066a168ee8..23fa01d5c104ef10385f86d13b892b3c8cc9732b 100644
--- a/chrome/browser/ui/browser_close_browsertest.cc
+++ b/chrome/browser/ui/browser_close_browsertest.cc
@@ -178,7 +178,8 @@ class BrowserCloseTest : public InProcessBrowserTest {
                                   chrome::HostDesktopType host_desktop_type) {
     Browser* new_browser =
         new Browser(Browser::CreateParams(profile, host_desktop_type));
-    chrome::AddSelectedTabWithURL(new_browser, GURL(content::kAboutBlankURL),
+    chrome::AddSelectedTabWithURL(new_browser,
+                                  GURL(url::kAboutBlankURL),
                                   content::PAGE_TRANSITION_AUTO_TOPLEVEL);
     content::WaitForLoadStop(
         new_browser->tab_strip_model()->GetActiveWebContents());