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

chrome/browser/ui/cocoa/view_id_util_browsertest.mm

Index: chrome/browser/ui/cocoa/view_id_util_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/view_id_util_browsertest.mm b/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
index 033a15ce28c78d5b796c490ac36a6fd796ea3ff2..9fb07be6c6949aad25e66257bac7d326a441af19 100644
--- a/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
+++ b/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
@@ -60,7 +60,7 @@ class ViewIDTest : public InProcessBrowserTest {
         test::WaitForBookmarkModelToLoad(bookmark_model);
 
       bookmark_utils::AddIfNotBookmarked(
-          bookmark_model, GURL(content::kAboutBlankURL),
+          bookmark_model, GURL(url::kAboutBlankURL),
           base::ASCIIToUTF16("about"));
     }
 
@@ -106,7 +106,7 @@ IN_PROC_BROWSER_TEST_F(ViewIDTest, Tab) {
   for (int i = 1; i <= 9; ++i) {
     CheckViewID(static_cast<ViewID>(VIEW_ID_TAB_0 + i), false);
     browser()->OpenURL(OpenURLParams(
-        GURL(content::kAboutBlankURL), Referrer(), NEW_BACKGROUND_TAB,
+        GURL(url::kAboutBlankURL), Referrer(), NEW_BACKGROUND_TAB,
          content::PAGE_TRANSITION_TYPED, false));
     CheckViewID(static_cast<ViewID>(VIEW_ID_TAB_0 + i), true);
     // VIEW_ID_TAB_LAST should always be available.
@@ -115,7 +115,7 @@ IN_PROC_BROWSER_TEST_F(ViewIDTest, Tab) {
 
   // Open the 11th tab.
   browser()->OpenURL(OpenURLParams(
-      GURL(content::kAboutBlankURL), Referrer(), NEW_BACKGROUND_TAB,
+      GURL(url::kAboutBlankURL), Referrer(), NEW_BACKGROUND_TAB,
       content::PAGE_TRANSITION_TYPED, false));
   CheckViewID(VIEW_ID_TAB_LAST, true);
 }