[Offline pages] Remove references to MessageLoop from components/offline_pages

components/offline_pages/offline_page_metadata_store_impl.cc

Index: components/offline_pages/offline_page_metadata_store_impl.cc
diff --git a/components/offline_pages/offline_page_metadata_store_impl.cc b/components/offline_pages/offline_page_metadata_store_impl.cc
index d1b9ce8b1dc59099a9f037b6d54dff814a54b5f1..ee2fb85bd37c5f0a4ef082caa3bba3d2c4376132 100644
--- a/components/offline_pages/offline_page_metadata_store_impl.cc
+++ b/components/offline_pages/offline_page_metadata_store_impl.cc
@@ -10,7 +10,6 @@
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
@@ -216,8 +215,8 @@ void OfflinePageMetadataStoreImpl::UpdateEntries(
     // Callback is invoked through message loop to avoid improper retry and
     // simplify testing.
     DVLOG(1) << "Offline pages database not available in UpdateEntries.";
-    base::MessageLoop::current()->PostTask(FROM_HERE,
-                                           base::Bind(callback, false));
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
+                                                  base::Bind(callback, false));
     return;
   }