Add metrics for paths in file scheme exceptions in content settings.

components/content_settings/core/common/content_settings_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.
 
 // Patterns used in content setting rules.
 
 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_PATTERN_H_
 #define COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_PATTERN_H_
 
 #include <string>
@@ skipping 176 matching lines @@
 
   // True if this pattern matches all hosts (i.e. it has a host wildcard).
   bool MatchesAllHosts() const;
 
   // Returns a std::string representation of this pattern.
   std::string ToString() const;
 
   // Returns scheme type of pattern.
   ContentSettingsPattern::SchemeType GetScheme() const;
 
+  // True if this pattern has a non-empty path.  Can only be used for patterns
+  // with file: schemes.
+  bool HasPath() const;
+
   // Compares the pattern with a given |other| pattern and returns the
   // |Relation| of the two patterns.
   Relation Compare(const ContentSettingsPattern& other) const;
 
   // Returns true if the pattern and the |other| pattern are identical.
   bool operator==(const ContentSettingsPattern& other) const;
 
   // Returns true if the pattern and the |other| pattern are not identical.
   bool operator!=(const ContentSettingsPattern& other) const;
 
@@ skipping 27 matching lines @@
       const ContentSettingsPattern::PatternParts& other_parts);
 
   ContentSettingsPattern(const PatternParts& parts, bool valid);
 
   PatternParts parts_;
 
   bool is_valid_;
 };
 
 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_PATTERN_H_