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

components/content_settings/core/common/content_settings_pattern.cc

 // 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.
 
 #include "components/content_settings/core/common/content_settings_pattern.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
@@ skipping 596 matching lines @@
   if (parts_.is_scheme_wildcard)
     return SCHEME_WILDCARD;
 
   for (size_t i = 2; i < arraysize(kSchemeNames); ++i) {
     if (parts_.scheme == kSchemeNames[i])
       return static_cast<SchemeType>(i);
   }
   return SCHEME_OTHER;
 }
 
+bool ContentSettingsPattern::HasPath() const {
+  DCHECK_EQ(GetScheme(), SCHEME_FILE);
+  return !parts_.is_path_wildcard && !parts_.path.empty();
+}
+
 ContentSettingsPattern::Relation ContentSettingsPattern::Compare(
     const ContentSettingsPattern& other) const {
   // Two invalid patterns are identical in the way they behave. They don't match
   // anything and are represented as an empty string. So it's fair to treat them
   // as identical.
   if ((this == &other) ||
       (!is_valid_ && !other.is_valid_))
     return IDENTITY;
 
   if (!is_valid_ && other.is_valid_)
@@ skipping 188 matching lines @@
   if (!parts.is_path_wildcard && other_parts.is_path_wildcard)
     return ContentSettingsPattern::PREDECESSOR;
 
   int result = parts.path.compare(other_parts.path);
   if (result == 0)
     return ContentSettingsPattern::IDENTITY;
   if (result > 0)
     return ContentSettingsPattern::DISJOINT_ORDER_PRE;
   return ContentSettingsPattern::DISJOINT_ORDER_POST;
 }