Move some content url constants to /url.

chrome/browser/history/history_backend.cc

Index: chrome/browser/history/history_backend.cc
diff --git a/chrome/browser/history/history_backend.cc b/chrome/browser/history/history_backend.cc
index fca0c7a69267ac06126bec1a3737e6e4be80a56b..e121f4065c866da85ec4f9060dea30eeafdd1f25 100644
--- a/chrome/browser/history/history_backend.cc
+++ b/chrome/browser/history/history_backend.cc
@@ -44,6 +44,7 @@
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "sql/error_delegate_util.h"
 #include "url/gurl.h"
+#include "url/url_constants.h"
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/history/android/android_provider_backend.h"
@@ -405,8 +406,8 @@ void HistoryBackend::AddPage(const HistoryAddPageArgs& request) {
       !is_keyword_generated) {
     const GURL& origin_url(has_redirects ?
         request.redirects[0] : request.url);
-    if (origin_url.SchemeIs(content::kHttpScheme) ||
-        origin_url.SchemeIs(content::kHttpsScheme) ||
+    if (origin_url.SchemeIs(url::kHttpScheme) ||
+        origin_url.SchemeIs(url::kHttpsScheme) ||
         origin_url.SchemeIs(content::kFtpScheme)) {
       std::string host(origin_url.host());
       size_t registry_length =