Add a FrameHostMsg_BeginNavigation IPC

content/browser/frame_host/navigation_request.cc

+// Copyright 2014 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/frame_host/navigation_request.h"
+
+#include "base/logging.h"
+#include "content/browser/frame_host/navigation_request_info.h"
+#include "content/browser/loader/resource_dispatcher_host_impl.h"
+#include "content/common/resource_request_body.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+namespace {
+
+void OnBeginNavigation(const NavigationRequestInfo& info,
+                       scoped_refptr<ResourceRequestBody> request_body,

[clamy, 2014/07/03 15:10:51]

request_body is used as a separate parameter in this method (instead of being
part of the struct) to be properly passed between threads.

+                       int64 frame_node_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  ResourceDispatcherHostImpl::Get()->NavigationRequest(
+      info, request_body, frame_node_id);
+}
+
+}  // namespace
+
+NavigationRequest::NavigationRequest() {}
+
+NavigationRequest::~NavigationRequest() {
+  // TODO(clamy): Cancel the corresponding request in ResourceDispatcherHost if
+  // it has not commited yet.
+}
+
+void NavigationRequest::BeginNavigation(
+    const NavigationRequestInfo& info,
+    scoped_refptr<ResourceRequestBody> request_body,
+    int64 frame_node_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&OnBeginNavigation, info, request_body, frame_node_id));
+}
+
+}  // namespace content