Change DCHECKs to CHECKs to investigate a crash when aborting in Files app.

chrome/browser/chromeos/file_system_provider/throttled_file_system.cc

Index: chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
diff --git a/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc b/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
index 66e3965ffffba9af2ed6d98ea963d013a9510616..df4e424d3e7633fda4bfda99da1de1d698b25401 100644
--- a/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
+++ b/chrome/browser/chromeos/file_system_provider/throttled_file_system.cc
@@ -216,7 +216,7 @@ void ThrottledFileSystem::OnCloseFileCompleted(
   // closed on the C++ side. Release the task from the queue, so other files
   // which are enqueued can be opened.
   const auto it = opened_files_.find(file_handle);
-  DCHECK(it != opened_files_.end());
+  CHECK(it != opened_files_.end());
 
   const int queue_token = it->second;
   open_queue_->Remove(queue_token);