Support "always allow" for runtime script execution

extensions/common/url_pattern.h

Index: extensions/common/url_pattern.h
diff --git a/extensions/common/url_pattern.h b/extensions/common/url_pattern.h
index 5a0e8c6ffd32608ffda548e68b071bfddecba6ad..538d7797ed3e61998313ab84cd1d5489e799a03d 100644
--- a/extensions/common/url_pattern.h
+++ b/extensions/common/url_pattern.h
@@ -162,6 +162,12 @@ class URLPattern {
   // cached.
   bool ImpliesAllHosts() const;
 
+  // Returns true if the pattern only matches a single origin.
+  bool IsOrigin() const;

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

I'm silly. IsOrigin() is wrong, MatchesSingleOrigin() is right. You should
improve the comment here to include "The pattern may include a path."

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

Done.

+
+  // Returns the pattern's origin as a GURL.
+  GURL ToOrigin() const;
+
   // Sets the port. Returns false if the port is invalid.
   bool SetPort(const std::string& port);
   const std::string& port() const { return port_; }