Support "always allow" for runtime script execution

extensions/common/url_pattern.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #ifndef EXTENSIONS_COMMON_URL_PATTERN_H_
 #define EXTENSIONS_COMMON_URL_PATTERN_H_
 
 #include <functional>
 #include <iosfwd>
 #include <string>
 #include <vector>
@@ skipping 144 matching lines @@
   // Returns true if |test| matches our path.
   bool MatchesPath(const std::string& test) const;
 
   // Returns true if the pattern is vague enough that it implies all hosts,
   // such as *://*/*.
   // This is an expensive method, and should be used sparingly!
   // You should probably use URLPatternSet::ShouldWarnAllHosts(), which is
   // cached.
   bool ImpliesAllHosts() const;
 
+  // Returns true if the pattern only matches a single origin. The pattern may
+  // include a path.
+  bool MatchesSingleOrigin() const;
+
   // Sets the port. Returns false if the port is invalid.
   bool SetPort(const std::string& port);
   const std::string& port() const { return port_; }
 
   // Returns a string representing this instance.
   const std::string& GetAsString() const;
 
   // Determines whether there is a URL that would match this instance and
   // another instance. This method is symmetrical: Calling
   // other.OverlapsWith(this) would result in the same answer.
@@ skipping 73 matching lines @@
 
   // A string representing this URLPattern.
   mutable std::string spec_;
 };
 
 std::ostream& operator<<(std::ostream& out, const URLPattern& url_pattern);
 
 typedef std::vector<URLPattern> URLPatternList;
 
 #endif  // EXTENSIONS_COMMON_URL_PATTERN_H_