Changed previews component to be a layered component.

components/previews/previews_io_data.cc

Index: components/previews/previews_io_data.cc
diff --git a/components/previews/previews_io_data.cc b/components/previews/previews_io_data.cc
deleted file mode 100644
index f72395277c6065a5039f3e65b4f2c0f55d6bfec2..0000000000000000000000000000000000000000
--- a/components/previews/previews_io_data.cc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2016 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 "components/previews/previews_io_data.h"
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "components/previews/previews_ui_service.h"
-
-namespace previews {
-
-PreviewsIOData::PreviewsIOData(
-    const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner,
-    const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
-    : ui_task_runner_(ui_task_runner),
-      io_task_runner_(io_task_runner),
-      weak_factory_(this) {}
-
-PreviewsIOData::~PreviewsIOData() {}
-
-void PreviewsIOData::Initialize(
-    base::WeakPtr<PreviewsUIService> previews_ui_service) {
-  DCHECK(ui_task_runner_->BelongsToCurrentThread());
-  previews_ui_service_ = previews_ui_service;
-
-  // Set up the IO thread portion of |this|.
-  io_task_runner_->PostTask(FROM_HERE,
-                            base::Bind(&PreviewsIOData::InitializeOnIOThread,
-                                       base::Unretained(this)));
-}
-
-void PreviewsIOData::InitializeOnIOThread() {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  ui_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&PreviewsUIService::SetIOData, previews_ui_service_,
-                            weak_factory_.GetWeakPtr()));
-}
-
-}  // namespace previews