Support "always allow" for runtime script execution

extensions/common/url_pattern.cc

Index: extensions/common/url_pattern.cc
diff --git a/extensions/common/url_pattern.cc b/extensions/common/url_pattern.cc
index 735e71e9fa0298704005aa12e3f11fd8fabbc86e..9bec70150aea76b988a31b4c9c193563963af696 100644
--- a/extensions/common/url_pattern.cc
+++ b/extensions/common/url_pattern.cc
@@ -466,6 +466,23 @@ bool URLPattern::ImpliesAllHosts() const {
   return registry_length > 0;
 }
 
+bool URLPattern::IsOrigin() const {
+  // We ignore the port because it's not all that interesting.

[not at google - send to devlin, 2014/08/13 22:59:17]

Actually a better explanation would be

// Strictly speaking the port is part of the origin, but in URLPattern it
defaults to *. It's not very interesting anyway, so leave it out.

[gpdavis, 2014/08/13 23:23:06]

Done.

+  return !ImpliesAllHosts() && scheme_ != "*" && !match_subdomains_;
+}
+
+GURL URLPattern::ToOrigin() const {
+  if (!IsOrigin())
+    return GURL();
+
+  URLPattern origin(valid_schemes());
+  origin.SetScheme(scheme());
+  origin.SetHost(host());
+  origin.SetPort(port());
+  origin.SetPath("/*");
+  return GURL(origin.GetAsString());
+}
+
 bool URLPattern::MatchesPath(const std::string& test) const {
   // Make the behaviour of OverlapsWith consistent with MatchesURL, which is
   // need to match hosted apps on e.g. 'google.com' also run on 'google.com/'.