Fix typo in Safe Browsing network annotations

'safe_browsing_g4_update': s/g4/v4/

Bug: 876856
Change-Id: Iefda4121e331a5005d9372e5bfcc493646e5e47d
Reviewed-on: https://chromium-review.googlesource.com/1187322
Commit-Queue: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586363}

components/safe_browsing/db/v4_update_protocol_manager.cc

@@ -312,7 +312,7 @@ void V4UpdateProtocolManager::IssueUpdateRequest() {
   }
 
   net::NetworkTrafficAnnotationTag traffic_annotation =
-      net::DefineNetworkTrafficAnnotation("safe_browsing_g4_update", R"(
+      net::DefineNetworkTrafficAnnotation("safe_browsing_v4_update", R"(
         semantics {
           sender: "Safe Browsing"
           description:

tools/traffic_annotation/summary/annotations.xml

@@ -215,7 +215,7 @@ Refer to README.md for content description and update process.
  <item id="safe_browsing_client_side_phishing_detector" hash_code="1313982" type="0" content_hash_code="50199143" os_list="linux,windows" file_path="chrome/browser/safe_browsing/client_side_detection_service.cc"/>
  <item id="safe_browsing_extended_reporting" hash_code="42848942" type="0" content_hash_code="50089173" os_list="linux,windows" file_path="components/safe_browsing/ping_manager.cc"/>
  <item id="safe_browsing_feedback" hash_code="44583821" type="0" content_hash_code="114076664" os_list="linux,windows" file_path="chrome/browser/safe_browsing/download_protection/download_feedback.cc"/>
- <item id="safe_browsing_g4_update" hash_code="75153841" type="0" content_hash_code="112049516" os_list="linux,windows" file_path="components/safe_browsing/db/v4_update_protocol_manager.cc"/>
+ <item id="safe_browsing_v4_update" hash_code="82509217" type="0" content_hash_code="5247849" os_list="linux,windows" file_path="components/safe_browsing/db/v4_update_protocol_manager.cc"/>
  <item id="safe_browsing_incident" hash_code="124950347" type="0" content_hash_code="58481082" os_list="linux,windows" file_path="chrome/browser/safe_browsing/incident_reporting/incident_report_uploader_impl.cc"/>
  <item id="safe_browsing_module_loader" hash_code="6019475" type="0" content_hash_code="49511650" os_list="linux,windows" file_path="chrome/browser/safe_browsing/client_side_model_loader.cc"/>
  <item id="safe_browsing_v4_get_hash" hash_code="8561691" type="0" content_hash_code="132435617" os_list="linux,windows" file_path="components/safe_browsing/db/v4_get_hash_protocol_manager.cc"/>