[chrome/test] favor DCHECK_CURRENTLY_ON for better logs

chrome/test/base/testing_io_thread_state.cc

Index: chrome/test/base/testing_io_thread_state.cc
diff --git a/chrome/test/base/testing_io_thread_state.cc b/chrome/test/base/testing_io_thread_state.cc
index e79423fb67954f5baa05b86f75190734b01330f9..30b9069805556229a074c0c2b53f6dedf82d43e5 100644
--- a/chrome/test/base/testing_io_thread_state.cc
+++ b/chrome/test/base/testing_io_thread_state.cc
@@ -79,7 +79,7 @@ TestingIOThreadState::~TestingIOThreadState() {
 }
 
 void TestingIOThreadState::Initialize(const base::Closure& done) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   io_thread_state_->SetGlobalsForTesting(new IOThread::Globals());
 
@@ -87,7 +87,7 @@ void TestingIOThreadState::Initialize(const base::Closure& done) {
 }
 
 void TestingIOThreadState::Shutdown(const base::Closure& done) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   delete io_thread_state_->globals();
   io_thread_state_->SetGlobalsForTesting(NULL);