Replace the old URL format for PVer4 requests with the new format.

components/safe_browsing_db/v4_update_protocol_manager.cc

Index: components/safe_browsing_db/v4_update_protocol_manager.cc
diff --git a/components/safe_browsing_db/v4_update_protocol_manager.cc b/components/safe_browsing_db/v4_update_protocol_manager.cc
index 483d57871f50d366d9bb69eb886b3e848f3b7bc6..9bdf7726fb6c6431c6a213a28b9c10e93465e26e 100644
--- a/components/safe_browsing_db/v4_update_protocol_manager.cc
+++ b/components/safe_browsing_db/v4_update_protocol_manager.cc
@@ -276,13 +276,16 @@ void V4UpdateProtocolManager::IssueUpdateRequest() {
     return;
   }
 
+  net::HttpRequestHeaders headers;
   std::string req_base64 =
       GetBase64SerializedUpdateRequestProto(current_list_states_);
-  GURL update_url = GetUpdateUrl(req_base64);
+  GURL update_url = GetUpdateUrlAndUpdateHeaders(req_base64, &headers);
 
-  request_.reset(net::URLFetcher::Create(url_fetcher_id_++, update_url,
-                                         net::URLFetcher::GET, this)
-                     .release());
+  std::unique_ptr<net::URLFetcher> fetcher = net::URLFetcher::Create(
+      url_fetcher_id_++, update_url, net::URLFetcher::GET, this);
+  fetcher->SetExtraRequestHeaders(headers.ToString());
+
+  request_.reset(fetcher.release());
 
   request_->SetLoadFlags(net::LOAD_DISABLE_CACHE);
   request_->SetRequestContext(request_context_getter_.get());
@@ -339,10 +342,11 @@ void V4UpdateProtocolManager::OnURLFetchComplete(
   }
 }
 
-GURL V4UpdateProtocolManager::GetUpdateUrl(
-    const std::string& req_base64) const {
-  GURL url = V4ProtocolManagerUtil::GetRequestUrl(req_base64, "encodedUpdates",
-                                                  config_);
+GURL V4UpdateProtocolManager::GetUpdateUrlAndUpdateHeaders(
+    const std::string& req_base64,
+    net::HttpRequestHeaders* headers) const {
+  GURL url = V4ProtocolManagerUtil::GetRequestUrlAndUpdateHeaders(
+      req_base64, "threatListUpdates:fetch", config_, headers);
   DVLOG(1) << "V4UpdateProtocolManager::GetUpdateUrl: "
            << "url: " << url;
   return url;