Adding instrumentation to locate the source of jankiness.

google_apis/gaia/gaia_oauth_client.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/gaia_oauth_client.h"
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "google_apis/gaia/gaia_urls.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_fetcher_delegate.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
@@ skipping 199 matching lines @@
   request_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                          net::LOAD_DO_NOT_SAVE_COOKIES);
   // See comment on SetAutomaticallyRetryOnNetworkChanges() above.
   request_->SetAutomaticallyRetryOnNetworkChanges(3);
   request_->Start();
 }
 
 // URLFetcher::Delegate implementation.
 void GaiaOAuthClient::Core::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 GaiaOAuthClient::Core::OnURLFetchComplete"));
+
   bool should_retry = false;
   HandleResponse(source, &should_retry);
   if (should_retry) {
     // Explicitly call ReceivedContentWasMalformed() to ensure the current
     // request gets counted as a failure for calculation of the back-off
     // period.  If it was already a failure by status code, this call will
     // be ignored.
     request_->ReceivedContentWasMalformed();
     num_retries_++;
     // We must set our request_context_getter_ again because
@@ skipping 154 matching lines @@
   return core_->GetUserInfo(access_token, max_retries, delegate);
 }
 
 void GaiaOAuthClient::GetTokenInfo(const std::string& access_token,
                                    int max_retries,
                                    Delegate* delegate) {
   return core_->GetTokenInfo(access_token, max_retries, delegate);
 }
 
 }  // namespace gaia