Move two more constants into content namespace.

content/public/common/url_constants.cc

Index: content/public/common/url_constants.cc
diff --git a/content/public/common/url_constants.cc b/content/public/common/url_constants.cc
index d8936c54095cff710dce08ad8158d4f4815b3ce9..71ab6488621fac1ad041118c7af6d477196f7519 100644
--- a/content/public/common/url_constants.cc
+++ b/content/public/common/url_constants.cc
@@ -22,12 +22,12 @@ const char kGuestScheme[] = "chrome-guest";
 const char kHttpScheme[] = "http";
 const char kHttpsScheme[] = "https";
 const char kJavaScriptScheme[] = "javascript";
-const char kMailToScheme[] = "mailto";
-const char kMetadataScheme[] = "metadata";
 }  // namespace chrome
 
 namespace content {
 
+const char kMailToScheme[] = "mailto";
+const char kMetadataScheme[] = "metadata";
 const char kSwappedOutScheme[] = "swappedout";
 const char kViewSourceScheme[] = "view-source";