Move URLLoaderClientImpl to a separate file

content/child/url_loader_client_impl.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/child/url_loader_client_impl.h"
+
+#include "base/callback.h"
+#include "base/single_thread_task_runner.h"
+#include "content/child/resource_dispatcher.h"
+#include "content/child/url_response_body_consumer.h"
+#include "content/common/resource_messages.h"
+#include "mojo/public/cpp/bindings/associated_group.h"
+#include "net/url_request/redirect_info.h"
+
+namespace content {
+
+URLLoaderClientImpl::URLLoaderClientImpl(
+    int request_id,
+    ResourceDispatcher* resource_dispatcher,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
+    : binding_(this),
+      request_id_(request_id),
+      resource_dispatcher_(resource_dispatcher),
+      task_runner_(std::move(task_runner)) {}
+
+URLLoaderClientImpl::~URLLoaderClientImpl() {
+  if (body_consumer_)
+    body_consumer_->Cancel();
+}
+
+void URLLoaderClientImpl::Bind(
+    mojom::URLLoaderClientAssociatedPtrInfo* client_ptr_info,
+    mojo::AssociatedGroup* associated_group) {
+  binding_.Bind(client_ptr_info, associated_group);
+}
+
+void URLLoaderClientImpl::OnReceiveResponse(
+    const ResourceResponseHead& response_head,
+    mojom::DownloadedTempFilePtr downloaded_file) {
+  has_received_response_ = true;
+  if (body_consumer_)
+    body_consumer_->Start();
+  downloaded_file_ = std::move(downloaded_file);
+  Dispatch(ResourceMsg_ReceivedResponse(request_id_, response_head));
+}
+
+void URLLoaderClientImpl::OnReceiveRedirect(
+    const net::RedirectInfo& redirect_info,
+    const ResourceResponseHead& response_head) {
+  DCHECK(!has_received_response_);
+  DCHECK(!body_consumer_);
+  Dispatch(
+      ResourceMsg_ReceivedRedirect(request_id_, redirect_info, response_head));
+}
+
+void URLLoaderClientImpl::OnDataDownloaded(int64_t data_len,
+                                           int64_t encoded_data_len) {
+  Dispatch(ResourceMsg_DataDownloaded(request_id_, data_len, encoded_data_len));
+}
+
+void URLLoaderClientImpl::OnTransferSizeUpdated(int32_t transfer_size_diff) {
+  resource_dispatcher_->OnTransferSizeUpdated(request_id_,
+                                              transfer_size_diff);
+}
+
+void URLLoaderClientImpl::OnStartLoadingResponseBody(
+    mojo::ScopedDataPipeConsumerHandle body) {
+  DCHECK(!body_consumer_);
+  body_consumer_ = new URLResponseBodyConsumer(
+      request_id_, resource_dispatcher_, std::move(body), task_runner_);
+  if (has_received_response_)
+    body_consumer_->Start();
+}
+
+void URLLoaderClientImpl::OnComplete(
+    const ResourceRequestCompletionStatus& status) {
+  if (!body_consumer_) {
+    Dispatch(ResourceMsg_RequestComplete(request_id_, status));
+    return;
+  }
+  body_consumer_->OnComplete(status);
+}
+
+void URLLoaderClientImpl::Dispatch(const IPC::Message& message) {
+  resource_dispatcher_->OnMessageReceived(message);
+}
+
+}  // namespace content