Have Permission{Manager,Service} use Origin.

url/origin.h

Index: url/origin.h
diff --git a/url/origin.h b/url/origin.h
index aab1f05a2013cc84cd4aedbb91a9e10b0df88307..8294513112a245ca211bad891c2f9a06d16eba57 100644
--- a/url/origin.h
+++ b/url/origin.h
@@ -89,6 +89,9 @@ class URL_EXPORT Origin {
   // 3. 'file' URLs all parse as ("file", "", 0).
   explicit Origin(const GURL& url);
 
+  // A convenience: Origin(GURL(url_string)).
+  explicit Origin(const std::string& url_string);
+
   // Creates an Origin from a |scheme|, |host|, and |port|. All the parameters
   // must be valid and canonicalized. In particular, note that this cannot be
   // used to create unique origins; 'url::Origin()' is the right way to do that.
@@ -110,6 +113,7 @@ class URL_EXPORT Origin {
   uint16_t port() const { return tuple_.port(); }
 
   bool unique() const { return unique_; }
+  bool is_empty() const { return empty_; }

[Mike West, 2016/03/03 09:20:02]

If we're going to distinguish between unique origins and empty origins, should
we also distinguish the serializations? ("" vs "null")?

[palmer, 2016/03/03 21:32:56]

Done.

 
   // An ASCII serialization of the Origin as per Section 6.2 of RFC 6454, with
   // the addition that all Origins with a 'file' scheme serialize to "file://".
@@ -131,6 +135,7 @@ class URL_EXPORT Origin {
 
   SchemeHostPort tuple_;
   bool unique_;
+  bool empty_;
 };
 
 URL_EXPORT std::ostream& operator<<(std::ostream& out, const Origin& origin);