Add migration code to change existing domain scoped content settings to be origin scoped

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 74a9ffaf86d16c055e4613fe3daac1f076becb74..2a2ddc1d9c34bcbeacbe74433373279ec43a712f 100644
--- a/components/content_settings/core/common/content_settings_pattern.cc
+++ b/components/content_settings/core/common/content_settings_pattern.cc
@@ -439,6 +439,24 @@ ContentSettingsPattern ContentSettingsPattern::FromString(
 }
 
 // static
+ContentSettingsPattern ContentSettingsPattern::FromDomainToOrigin(
+    const ContentSettingsPattern domain_pattern) {
+  ContentSettingsPattern origin_pattern(domain_pattern);
+
+  if (domain_pattern.parts_.is_scheme_wildcard) {
+    origin_pattern.parts_.scheme = url::kHttpScheme;
+    origin_pattern.parts_.is_scheme_wildcard = false;
+  }
+  if (domain_pattern.parts_.has_domain_wildcard)
+    origin_pattern.parts_.has_domain_wildcard = false;
+  if (domain_pattern.parts_.is_port_wildcard) {
+    origin_pattern.parts_.port = GetDefaultPort(origin_pattern.parts_.scheme);
+    origin_pattern.parts_.is_port_wildcard = false;
+  }
+  return origin_pattern;
+}
+
+// static
 void ContentSettingsPattern::SetNonWildcardDomainNonPortScheme(
     const char* scheme) {
   DCHECK(scheme);
@@ -529,6 +547,27 @@ bool ContentSettingsPattern::MatchesAllHosts() const {
   return parts_.has_domain_wildcard && parts_.host.empty();
 }
 
+bool ContentSettingsPattern::IsGeneratedUsingFromURL() const {
+  // Generated patterns must either have a scheme wildcard or be https.
+  if (parts_.scheme != url::kHttpsScheme && !parts_.is_scheme_wildcard)
+    return false;
+
+  // Generated patterns will either have a port wildcard or be https (but not
+  // both).
+  if (parts_.is_port_wildcard && parts_.scheme == url::kHttpsScheme)
+    return false;
+
+  // Generated patterns will always have a domain wildcard.
+  if (!parts_.has_domain_wildcard)
+    return false;
+
+  // Generated patterns will always have a host.
+  if (parts_.host.empty())
+    return false;
+
+  return true;
+}
+
 std::string ContentSettingsPattern::ToString() const {
   if (IsValid())
     return content_settings::PatternParser::ToString(parts_);