Allow extensions on chrome:// URLs, when flag is set and permission is explicitly requested

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 a6dfa7480af2e2514060623c5b79968cd5b0f661..3775f0b0090e661551c027d49761e24b6ad914d5 100644
--- a/extensions/common/url_pattern.h
+++ b/extensions/common/url_pattern.h
@@ -100,6 +100,9 @@ class URLPattern {
   int valid_schemes() const { return valid_schemes_; }
   void SetValidSchemes(int valid_schemes);
 
+  int allowed_schemes() const { return allowed_schemes_; }
+  void SetAllowedSchemes(int allowed_schemes);
+
   // Gets the host the pattern matches. This can be an empty string if the
   // pattern matches all hosts (the input was <scheme>://*/<whatever>).
   const std::string& host() const { return host_; }
@@ -130,6 +133,10 @@ class URLPattern {
   // false otherwise. Uses valid_schemes_ to determine validity.
   bool IsValidScheme(const std::string& scheme) const;
 
+  // Returns true if the specified scheme is allowed by this URL pattern, and
+  // false otherwise. Uses allowed_schemes_ to determine status.
+  bool IsAllowedScheme(const std::string& scheme) const;
+
   // Returns true if this instance matches the specified URL.
   bool MatchesURL(const GURL& test) const;
 
@@ -188,6 +195,9 @@ class URLPattern {
   // Get an error string for a ParseResult.
   static const char* GetParseResultString(URLPattern::ParseResult parse_result);
 
+  // Checks whether the bit is set for the given scheme in the given scheme mask
+  static bool IsSchemeBitSet(const std::string& scheme, const int mask);
+
  private:
   // Returns true if any of the |schemes| items matches our scheme.
   bool MatchesAnyScheme(const std::vector<std::string>& schemes) const;
@@ -206,10 +216,14 @@ class URLPattern {
 
   // A bitmask containing the schemes which are considered valid for this
   // pattern. Parse() uses this to decide whether a pattern contains a valid
-  // scheme. MatchesScheme uses this to decide whether a wildcard scheme_
-  // matches a given test scheme.
+  // scheme.
   int valid_schemes_;
 
+  // A bitmask containing the schemes which return a positive match for this
+  // pattern. MatchesScheme uses this to decide whether a wildcard scheme_
+  // matches a given test scheme.
+  int allowed_schemes_;
+
   // True if this is a special-case "<all_urls>" pattern.
   bool match_all_urls_;