Fetch incremental updates. Store new state in V4Store.

components/safe_browsing_db/v4_protocol_manager_util.cc

Index: components/safe_browsing_db/v4_protocol_manager_util.cc
diff --git a/components/safe_browsing_db/v4_protocol_manager_util.cc b/components/safe_browsing_db/v4_protocol_manager_util.cc
index fde1c4aaaf6b710cdbcd8227a0df9a850e1c1b9b..225835129a284df3d8b9d44b0e627e49683c98ee 100644
--- a/components/safe_browsing_db/v4_protocol_manager_util.cc
+++ b/components/safe_browsing_db/v4_protocol_manager_util.cc
@@ -19,6 +19,13 @@ namespace safe_browsing {
 // The Safe Browsing V4 server URL prefix.
 const char kSbV4UrlPrefix[] = "https://safebrowsing.googleapis.com/v4";
 
+std::ostream& operator<<(std::ostream& os, const UpdateListIdentifier& id) {
+  os << "hash: " << id.hash() << "; platform_type: " << id.platform_type
+     << "; threat_entry_type: " << id.threat_entry_type
+     << "; threat_type: " << id.threat_type;
+  return os;
+}
+
 bool UpdateListIdentifier::operator==(const UpdateListIdentifier& other) const {
   return platform_type == other.platform_type &&
          threat_entry_type == other.threat_entry_type &&
@@ -38,6 +45,20 @@ size_t UpdateListIdentifier::hash() const {
   return base::HashInts(interim, third);
 }
 
+UpdateListIdentifier::UpdateListIdentifier() {}
+
+UpdateListIdentifier::UpdateListIdentifier(PlatformType platform_type,
+                                           ThreatEntryType threat_entry_type,
+                                           ThreatType threat_type)
+    : platform_type(platform_type),
+      threat_entry_type(threat_entry_type),
+      threat_type(threat_type) {}
+
+UpdateListIdentifier::UpdateListIdentifier(const ListUpdateResponse& response)
+    : UpdateListIdentifier(response.platform_type(),
+                           response.threat_entry_type(),
+                           response.threat_type()) {}
+
 V4ProtocolConfig::V4ProtocolConfig() : disable_auto_update(false) {}
 
 V4ProtocolConfig::V4ProtocolConfig(const V4ProtocolConfig& other) = default;