favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/media_galleries , metrics and nacl_host

chrome/browser/metrics/variations/variations_service.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 "chrome/browser/metrics/variations/variations_service.h"
 
 #include <set>
 
 #include "base/build_time.h"
 #include "base/command_line.h"
@@ skipping 303 matching lines @@
     } else {
       UMA_HISTOGRAM_COUNTS_100("Variations.SeedDateSkew.BuildTimeAheadBy",
                                build_time_delta_days);
     }
   }
 
   return true;
 }
 
 void VariationsService::StartRepeatedVariationsSeedFetch() {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // Initialize the Variations server URL.
   variations_server_url_ =
       GetVariationsServerURL(policy_pref_service_, restrict_mode_);
 
   // Check that |CreateTrialsFromSeed| was called, which is necessary to
   // retrieve the serial number that will be sent to the server.
   DCHECK(create_trials_from_seed_called_);
 
   DCHECK(!request_scheduler_.get());
@@ skipping 152 matching lines @@
 
   base::PostTaskAndReplyWithResult(
       content::BrowserThread::GetBlockingPool(),
       FROM_HERE,
       base::Bind(&GetVersionForSimulation),
       base::Bind(&VariationsService::PerformSimulationWithVersion,
                  weak_ptr_factory_.GetWeakPtr(), base::Passed(&seed)));
 }
 
 void VariationsService::FetchVariationsSeed() {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   const web_resource::ResourceRequestAllowedNotifier::State state =
       resource_request_allowed_notifier_->GetResourceRequestsAllowedState();
   RecordRequestsAllowedHistogram(ResourceRequestStateToHistogramValue(state));
   if (state != web_resource::ResourceRequestAllowedNotifier::ALLOWED) {
     DVLOG(1) << "Resource requests were not allowed. Waiting for notification.";
     return;
   }
 
   DoActualFetch();
@@ skipping 132 matching lines @@
     local_state_->SetInt64(prefs::kVariationsLastFetchTime,
                            base::Time::Now().ToInternalValue());
   }
 }
 
 std::string VariationsService::GetInvalidVariationsSeedSignature() const {
   return seed_store_.GetInvalidSignature();
 }
 
 }  // namespace chrome_variations