MD History: re-use history host constant from content/ instead of duplicating to chrome/

chrome/browser/android/ntp/new_tab_page_url_handler.cc

Index: chrome/browser/android/ntp/new_tab_page_url_handler.cc
diff --git a/chrome/browser/android/ntp/new_tab_page_url_handler.cc b/chrome/browser/android/ntp/new_tab_page_url_handler.cc
index 38dc11cb5e41825e861359a3eff38eff69d93ff9..e4396d207854049489e5ebdbcaef0447b57a3118 100644
--- a/chrome/browser/android/ntp/new_tab_page_url_handler.cc
+++ b/chrome/browser/android/ntp/new_tab_page_url_handler.cc
@@ -36,8 +36,8 @@ bool HandleAndroidNativePageURL(GURL* url,
     // chrome-native://history when M57 is a distant memory.
     // See http://crbug.com/654071.
     if (base::FeatureList::IsEnabled(features::kNativeAndroidHistoryManager) &&
-        (url->host() == kChromeUIHistoryHost ||
-            url->host() == kChromeUIHistoryFrameHost)) {
+        (url->host() == content::kChromeUIHistoryHost ||
+         url->host() == kChromeUIHistoryFrameHost)) {
       *url = GURL(content::kChromeUINativeHistoryURL);
       return true;
     }