Remove all remaining traces of MessageLoopProxy.

content/browser/fileapi/file_system_operation_runner_unittest.cc

Index: content/browser/fileapi/file_system_operation_runner_unittest.cc
diff --git a/content/browser/fileapi/file_system_operation_runner_unittest.cc b/content/browser/fileapi/file_system_operation_runner_unittest.cc
index 70436e6234b99302384fc970c80e7c9694de99d5..29a890530d670d2f19a283f0978ce4eecc1ec17c 100644
--- a/content/browser/fileapi/file_system_operation_runner_unittest.cc
+++ b/content/browser/fileapi/file_system_operation_runner_unittest.cc
@@ -194,7 +194,7 @@ class MultiThreadFileSystemOperationRunnerTest : public testing::Test {
     ScopedVector<storage::FileSystemBackend> additional_providers;
     file_system_context_ = new FileSystemContext(
         base::ThreadTaskRunnerHandle::Get().get(),
-        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE).get(),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE).get(),
         storage::ExternalMountPoints::CreateRefCounted().get(),
         make_scoped_refptr(new MockSpecialStoragePolicy()).get(), nullptr,
         std::move(additional_providers),