Use ThreadChecker rather than DCHECK_CURRENTLY_ON.

chrome/browser/profiles/off_the_record_profile_impl.cc

Index: chrome/browser/profiles/off_the_record_profile_impl.cc
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.cc b/chrome/browser/profiles/off_the_record_profile_impl.cc
index 4df068db2e8ab59c96abf0b040accd2cc8430a1c..06ae0cfea9c38c15be30511fbbfe046752760f2a 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.cc
+++ b/chrome/browser/profiles/off_the_record_profile_impl.cc
@@ -109,6 +109,8 @@ OffTheRecordProfileImpl::OffTheRecordProfileImpl(Profile* real_profile)
 }
 
 void OffTheRecordProfileImpl::Init() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
   // The construction of OffTheRecordProfileIOData::Handle needs the profile
   // type returned by this->GetProfileType().  Since GetProfileType() is a
   // virtual member function, we cannot call the function defined in the most
@@ -145,6 +147,9 @@ void OffTheRecordProfileImpl::Init() {
 
   InitHostZoomMap();
 
+  // Make sure HostContentSettingsMap is created on the UI thread.
+  GetHostContentSettingsMap();
+
 #if defined(ENABLE_PLUGINS)
   ChromePluginServiceFilter::GetInstance()->RegisterResourceContext(
       PluginPrefs::GetForProfile(this).get(),