Network traffic annotation added to OAuth2ApiCallFlow and its subclasses.

components/signin/core/browser/refresh_token_annotation_request.cc

Index: components/signin/core/browser/refresh_token_annotation_request.cc
diff --git a/components/signin/core/browser/refresh_token_annotation_request.cc b/components/signin/core/browser/refresh_token_annotation_request.cc
index 191dab8ebf42c126f388166400754f7fc5b5abde..b8f7a1d9cf988c74e3d0ac39049f48ff2b3e1932 100644
--- a/components/signin/core/browser/refresh_token_annotation_request.cc
+++ b/components/signin/core/browser/refresh_token_annotation_request.cc
@@ -17,6 +17,7 @@
 #include "google_apis/gaia/gaia_constants.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "net/base/escape.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace {
@@ -114,7 +115,28 @@ void RefreshTokenAnnotationRequest::OnGetTokenSuccess(
     const base::Time& expiration_time) {
   DCHECK(CalledOnValidThread());
   DVLOG(2) << "Got access token";
-  Start(request_context_getter_.get(), access_token);
+  net::NetworkTrafficAnnotationTag traffic_annotation =
+      net::DefineNetworkTrafficAnnotation("...", R"(
+        semantics {
+          sender: "..."
+          description: "..."
+          trigger: "..."
+          data: "..."
+          destination: WEBSITE/GOOGLE_OWNED_SERVICE/OTHER/LOCAL
+        }
+        policy {
+          cookies_allowed: false/true
+          cookies_store: "..."
+          setting: "..."
+          chrome_policy {
+            [POLICY_NAME] {
+              policy_options {mode: MANDATORY/RECOMMENDED/UNSET}
+              [POLICY_NAME]: ... //(value to disable it)
+            }
+          }
+          policy_exception_justification: "..."
+        })");
+  Start(request_context_getter_.get(), access_token, traffic_annotation);
 }
 
 void RefreshTokenAnnotationRequest::OnGetTokenFailure(