Accept invalid chrome-extension:// and chrome:// CSP tokens

extensions/common/csp_validator.cc

Index: extensions/common/csp_validator.cc
diff --git a/extensions/common/csp_validator.cc b/extensions/common/csp_validator.cc
index 65edd0a3aaffb578226972e59369a15c6b7fc8e0..23af91c75787c06964b62ea5ea1ee393e6deb19d 100644
--- a/extensions/common/csp_validator.cc
+++ b/extensions/common/csp_validator.cc
@@ -54,6 +54,12 @@ bool isNonWildcardTLD(const std::string& url,
   if (end_of_host == std::string::npos)
     end_of_host = url.size();
 
+  // A missing host such as "chrome-extension://" is invalid, but for backwards-
+  // compatibility, accept such CSP parts. They will be ignored by Blink anyway.
+  // TODO(robwu): Remove this special case once crbug.com/434773 is fixed.
+  if (start_of_host == end_of_host)
+    return true;
+
   // Note: It is sufficient to only compare the first character against '*'
   // because the CSP only allows wildcards at the start of a directive, see
   // host-source and host-part at http://www.w3.org/TR/CSP2/#source-list-syntax