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

components/content_settings/core/common/content_settings_pattern.cc

Index: components/content_settings/core/common/content_settings_pattern.cc
diff --git a/components/content_settings/core/common/content_settings_pattern.cc b/components/content_settings/core/common/content_settings_pattern.cc
index 348892e5d1523be701aa21a356b6aab3c60cb8c3..d27a128dc743de6977f4677985d4c34a91772891 100644
--- a/components/content_settings/core/common/content_settings_pattern.cc
+++ b/components/content_settings/core/common/content_settings_pattern.cc
@@ -614,6 +614,12 @@ ContentSettingsPattern::SchemeType ContentSettingsPattern::GetScheme() const {
   return SCHEME_OTHER;
 }
 
+bool ContentSettingsPattern::HasPath() const {
+  if (GetScheme() != SCHEME_FILE)
+    return false;

[lshang, 2016/09/26 01:57:13]

How about using DCHECK here? Since HasPath() is only valid for file scheme,
other schemes calling this method should be invalid, instead of returning false,
I think.

[alexmos, 2016/09/26 23:40:24]

Done.

+  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