favor DCHECK_CURRENTLY_ON for better logs in content/browser/[q-z]*

content/browser/tcmalloc_internals_request_job.cc

Index: content/browser/tcmalloc_internals_request_job.cc
diff --git a/content/browser/tcmalloc_internals_request_job.cc b/content/browser/tcmalloc_internals_request_job.cc
index 58e78afeea29d3ad8e5e05a7ed6aca5327ae6a9e..85ec2ed1c92268ad3e3603f97301fd60ad647ad5 100644
--- a/content/browser/tcmalloc_internals_request_job.cc
+++ b/content/browser/tcmalloc_internals_request_job.cc
@@ -33,13 +33,13 @@ void AboutTcmallocOutputs::OnStatsForChildProcess(
 
 void AboutTcmallocOutputs::SetOutput(const std::string& header,
                                      const std::string& output) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   outputs_[header] = output;
 }
 
 void AboutTcmallocOutputs::DumpToHTMLTable(std::string* data) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   data->append("<table width=\"100%\">\n");
   for (AboutTcmallocOutputsType::const_iterator oit = outputs_.begin();