Use SNAPSHOT sync mode for LocalSync

chrome/browser/sync_file_system/local/syncable_file_system_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/stl_util.h"
 #include "chrome/browser/sync_file_system/local/canned_syncable_file_system.h"
 #include "chrome/browser/sync_file_system/local/local_file_change_tracker.h"
 #include "chrome/browser/sync_file_system/local/local_file_sync_context.h"
 #include "chrome/browser/sync_file_system/local/sync_file_system_backend.h"
 #include "chrome/browser/sync_file_system/syncable_file_system_util.h"
@@ skipping 20 matching lines @@
 
 class SyncableFileSystemTest : public testing::Test {
  public:
   SyncableFileSystemTest()
       : file_system_(GURL("http://example.com/"),
                      base::MessageLoopProxy::current().get(),
                      base::MessageLoopProxy::current().get()),
         weak_factory_(this) {}
 
   virtual void SetUp() {
+    ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
+
     file_system_.SetUp();
 
     sync_context_ =
-        new LocalFileSyncContext(base::MessageLoopProxy::current().get(),
+        new LocalFileSyncContext(data_dir_.path(),
+                                 base::MessageLoopProxy::current().get(),
                                  base::MessageLoopProxy::current().get());
     ASSERT_EQ(
         sync_file_system::SYNC_STATUS_OK,
         file_system_.MaybeInitializeFileSystemContext(sync_context_.get()));
   }
 
   virtual void TearDown() {
     if (sync_context_.get())
       sync_context_->ShutdownOnUIThread();
     sync_context_ = NULL;
@@ skipping 226 matching lines @@
   // Now try copying the directory into the syncable file system, which should
   // fail if directory operation is disabled. (http://crbug.com/161442)
   EXPECT_NE(base::PLATFORM_FILE_OK,
             file_system_.Copy(kSrcDir, URL("dest")));
 
   other_file_system_.TearDown();
   SetEnableSyncFSDirectoryOperation(was_enabled);
 }
 
 }  // namespace sync_file_system