favor DCHECK_CURRENTLY_ON for better logs in content/browser/[f-p]*

content/browser/indexed_db/indexed_db_dispatcher_host.cc

Index: content/browser/indexed_db/indexed_db_dispatcher_host.cc
diff --git a/content/browser/indexed_db/indexed_db_dispatcher_host.cc b/content/browser/indexed_db/indexed_db_dispatcher_host.cc
index baa3a69d10c7c2db3fa191be338a6750d9eb33cf..17e461612f83e7e2a5b9356f9f7bfdf0f1fdd557 100644
--- a/content/browser/indexed_db/indexed_db_dispatcher_host.cc
+++ b/content/browser/indexed_db/indexed_db_dispatcher_host.cc
@@ -221,7 +221,7 @@ uint32 IndexedDBDispatcherHost::TransactionIdToProcessId(
 
 std::string IndexedDBDispatcherHost::HoldBlobData(
     const IndexedDBBlobInfo& blob_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
   std::string uuid = blob_info.uuid();
   storage::BlobStorageContext* context = blob_storage_context_->context();
   scoped_ptr<storage::BlobDataHandle> blob_data_handle;
@@ -247,7 +247,7 @@ std::string IndexedDBDispatcherHost::HoldBlobData(
 }
 
 void IndexedDBDispatcherHost::DropBlobData(const std::string& uuid) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
   BlobDataHandleMap::iterator iter = blob_data_handle_map_.find(uuid);
   if (iter != blob_data_handle_map_.end()) {
     DCHECK_GE(iter->second.second, 1);
@@ -378,7 +378,7 @@ void IndexedDBDispatcherHost::OnPutHelper(
 
 void IndexedDBDispatcherHost::OnAckReceivedBlobs(
     const std::vector<std::string>& uuids) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
   for (const auto& uuid : uuids)
     DropBlobData(uuid);
 }