Adding instrumentation to locate the source of jankiness.

google_apis/gaia/oauth2_access_token_fetcher_impl.cc

 // Copyright 2014 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_access_token_fetcher_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "google_apis/gaia/google_service_auth_error.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"
@@ skipping 227 matching lines @@
 }
 
 void OAuth2AccessTokenFetcherImpl::OnGetTokenFailure(
     const GoogleServiceAuthError& error) {
   state_ = ERROR_STATE;
   FireOnGetTokenFailure(error);
 }
 
 void OAuth2AccessTokenFetcherImpl::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 OAuth2AccessTokenFetcherImpl::OnURLFetchComplete"));
+
   CHECK(source);
   CHECK(state_ == GET_ACCESS_TOKEN_STARTED);
   EndGetAccessToken(source);
 }
 
 // static
 GURL OAuth2AccessTokenFetcherImpl::MakeGetAccessTokenUrl() {
   return GaiaUrls::GetInstance()->oauth2_token_url();
 }
 
@@ skipping 41 matching lines @@
 // static
 bool OAuth2AccessTokenFetcherImpl::ParseGetAccessTokenFailureResponse(
     const net::URLFetcher* source,
     std::string* error) {
   CHECK(error);
   scoped_ptr<base::DictionaryValue> value = ParseGetAccessTokenResponse(source);
   if (value.get() == NULL)
     return false;
   return value->GetString(kErrorKey, error);
 }