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

chrome/browser/extensions/activity_log/uma_policy.cc

Index: chrome/browser/extensions/activity_log/uma_policy.cc
diff --git a/chrome/browser/extensions/activity_log/uma_policy.cc b/chrome/browser/extensions/activity_log/uma_policy.cc
index 9073591a29bc8ec3def56bad9ab444c44907ca28..2fbb06411b780beea5db0d02edf9c250d4a39bd7 100644
--- a/chrome/browser/extensions/activity_log/uma_policy.cc
+++ b/chrome/browser/extensions/activity_log/uma_policy.cc
@@ -186,7 +186,7 @@ int UmaPolicy::MatchActionToStatus(scoped_refptr<Action> action) {
 void UmaPolicy::HistogramOnClose(const std::string& cleaned_url,
                                  content::WebContents* web_contents) {
   // Let's try to avoid histogramming useless URLs.
-  if (cleaned_url.empty() || cleaned_url == content::kAboutBlankURL ||
+  if (cleaned_url.empty() || cleaned_url == url::kAboutBlankURL ||
       cleaned_url == chrome::kChromeUINewTabURL)
     return;
 
@@ -395,7 +395,7 @@ void UmaPolicy::CleanupClosedPage(const std::string& cleaned_url,
 // We convert to a string in the hopes that this is faster than Replacements.
 std::string UmaPolicy::CleanURL(const GURL& gurl) {
   if (gurl.spec().empty())
-    return GURL(content::kAboutBlankURL).spec();
+    return GURL(url::kAboutBlankURL).spec();
   if (!gurl.is_valid())
     return gurl.spec();
   if (!gurl.has_ref())