Cleanup: Move kChromeUIScheme constant into content namespace.

chrome/common/extensions/manifest_handlers/content_scripts_handler.cc

Index: chrome/common/extensions/manifest_handlers/content_scripts_handler.cc
diff --git a/chrome/common/extensions/manifest_handlers/content_scripts_handler.cc b/chrome/common/extensions/manifest_handlers/content_scripts_handler.cc
index 94b5fd9062a3791764cc56a1975c98b8b1708cd0..2753614d523e78fa55ff29da77a7d02dba4a6e56 100644
--- a/chrome/common/extensions/manifest_handlers/content_scripts_handler.cc
+++ b/chrome/common/extensions/manifest_handlers/content_scripts_handler.cc
@@ -151,7 +151,7 @@ bool LoadUserScriptFromDictionary(const base::DictionaryValue* content_script,
 
     // TODO(aboxhall): check for webstore
     if (!PermissionsData::CanExecuteScriptEverywhere(extension) &&
-        pattern.scheme() != chrome::kChromeUIScheme) {
+        pattern.scheme() != content::kChromeUIScheme) {
       // Exclude SCHEME_CHROMEUI unless it's been explicitly requested.
       // If the --extensions-on-chrome-urls flag has not been passed, requesting
       // a chrome:// url will cause a parse failure above, so there's no need to