Adding instrumentation to locate the source of jankiness.

google_apis/gaia/oauth2_api_call_flow.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "google_apis/gaia/oauth2_api_call_flow.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/stringprintf.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "google_apis/gaia/oauth2_access_token_fetcher_impl.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_status.h"
 
@@ skipping 109 matching lines @@
 
 std::string OAuth2ApiCallFlow::CreateApiCallBodyContentType() {
   return "application/x-www-form-urlencoded";
 }
 
 OAuth2AccessTokenFetcher* OAuth2ApiCallFlow::CreateAccessTokenFetcher() {
   return new OAuth2AccessTokenFetcherImpl(this, context_, refresh_token_);
 }
 
 void OAuth2ApiCallFlow::OnURLFetchComplete(const net::URLFetcher* source) {
+  // TODO(vadimt): Remove ScopedProfile below once crbug.com/422577 is fixed.
+  tracked_objects::ScopedProfile tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422577 OAuth2ApiCallFlow::OnURLFetchComplete"));
+
   CHECK(source);
   CHECK_EQ(API_CALL_STARTED, state_);
   EndApiCall(source);
 }
 
 void OAuth2ApiCallFlow::OnGetTokenSuccess(const std::string& access_token,
                                           const base::Time& expiration_time) {
   access_token_ = access_token;
   EndMintAccessToken(NULL);
 }
@@ skipping 20 matching lines @@
   // especially at startup and after sign-in on ChromeOS. Retrying once should
   // be enough in those cases; let the fetcher retry up to 3 times just in case.
   // http://crbug.com/163710
   result->SetAutomaticallyRetryOnNetworkChanges(3);
 
   if (!empty_body)
     result->SetUploadData(CreateApiCallBodyContentType(), body);
 
   return result;
 }