Move LoaderIOThreadNotifier out of resource_dispatcher_host_impl.h

content/browser/loader/loader_io_thread_notifier.cc

+// 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 "content/browser/loader/loader_io_thread_notifier.h"
+
+#include "content/browser/frame_host/render_frame_host_impl.h"
+#include "content/browser/loader/global_routing_id.h"
+#include "content/browser/loader/resource_dispatcher_host_impl.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+namespace {
+
+void NotifyRenderFrameDeletedOnIO(const GlobalFrameRoutingId& id) {
+  ResourceDispatcherHostImpl* rdhi = ResourceDispatcherHostImpl::Get();
+  if (rdhi)
+    rdhi->OnRenderFrameDeleted(id);
+}
+
+}  // namespace
+
+LoaderIOThreadNotifier::LoaderIOThreadNotifier(WebContents* web_contents)
+    : WebContentsObserver(web_contents) {}
+
+LoaderIOThreadNotifier::~LoaderIOThreadNotifier() {}
+
+void LoaderIOThreadNotifier::RenderFrameDeleted(
+    RenderFrameHost* render_frame_host) {
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&NotifyRenderFrameDeletedOnIO,
+                 static_cast<RenderFrameHostImpl*>(render_frame_host)
+                     ->GetGlobalFrameRoutingId()));
+}
+
+}  // namespace content