Network traffic annotation added to OAuth2ApiCallFlow and its subclasses.

google_apis/gaia/oauth2_api_call_flow.h

Index: google_apis/gaia/oauth2_api_call_flow.h
diff --git a/google_apis/gaia/oauth2_api_call_flow.h b/google_apis/gaia/oauth2_api_call_flow.h
index 846a907e1e5fc35f7401f1077b8233f8a04a1f19..34cbbdba73515c20deac3f81b0094cd20a71e7c2 100644
--- a/google_apis/gaia/oauth2_api_call_flow.h
+++ b/google_apis/gaia/oauth2_api_call_flow.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/macros.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
@@ -55,6 +56,9 @@ class OAuth2ApiCallFlow : public net::URLFetcherDelegate {
   // Called when the API call failed.
   virtual void ProcessApiCallFailure(const net::URLFetcher* source) = 0;
 
+  virtual net::PartialNetworkTrafficAnnotationTag
+  GetNetworkTrafficAnnotationTag() = 0;
+
  private:
   enum State {
     INITIAL,