[chrome/browser/chromeos/drive] Avoid use of MessageLoopProxy by use of TTRH

chrome/browser/chromeos/drive/file_cache_unittest.cc

Index: chrome/browser/chromeos/drive/file_cache_unittest.cc
diff --git a/chrome/browser/chromeos/drive/file_cache_unittest.cc b/chrome/browser/chromeos/drive/file_cache_unittest.cc
index 4d0299965f6878e372226dba6a00e03097c6c076..fdfb9bb2a88dcdc7acf6d0db8ee1c117aa0be30f 100644
--- a/chrome/browser/chromeos/drive/file_cache_unittest.cc
+++ b/chrome/browser/chromeos/drive/file_cache_unittest.cc
@@ -13,6 +13,8 @@
 #include "base/files/scoped_temp_dir.h"
 #include "base/md5.h"
 #include "base/path_service.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/fake_free_disk_space_getter.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
@@ -44,15 +46,12 @@ class FileCacheTest : public testing::Test {
     fake_free_disk_space_getter_.reset(new FakeFreeDiskSpaceGetter);
 
     metadata_storage_.reset(new ResourceMetadataStorage(
-        metadata_dir,
-        base::MessageLoopProxy::current().get()));
+        metadata_dir, base::ThreadTaskRunnerHandle::Get()));
     ASSERT_TRUE(metadata_storage_->Initialize());
 
-    cache_.reset(new FileCache(
-        metadata_storage_.get(),
-        cache_files_dir_,
-        base::MessageLoopProxy::current().get(),
-        fake_free_disk_space_getter_.get()));
+    cache_.reset(new FileCache(metadata_storage_.get(), cache_files_dir_,
+                               base::ThreadTaskRunnerHandle::Get(),
+                               fake_free_disk_space_getter_.get()));
     ASSERT_TRUE(cache_->Initialize());
   }