Create RenderFrame/RenderFrameHost for the main frame of a page.

content/browser/renderer_host/render_frame_host_impl.cc

+// Copyright (c) 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 "content/browser/renderer_host/render_frame_host_impl.h"
+
+#include "content/browser/renderer_host/render_view_host_impl.h"
+
+namespace content {
+
+RenderFrameHostImpl::RenderFrameHostImpl(
+    RenderViewHostImpl* render_view_host,
+    int routing_id,
+    bool swapped_out)
+    : render_view_host_(render_view_host),
+      routing_id_(routing_id),
+      is_swapped_out_(swapped_out) {
+}
+
+RenderFrameHostImpl::~RenderFrameHostImpl() {
+}
+
+bool RenderFrameHostImpl::Send(IPC::Message* message) {
+  // Use the RenderViewHost object to send the message. It inherits it from
+  // RenderWidgetHost, which ultimately uses the current process' |Send|.

[Charlie Reis, 2013/05/30 18:26:59]

Minor nit: process's

[nasko, 2013/05/30 19:03:48]

Done.

+  return render_view_host_->Send(message);
+}
+
+bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
+  // Pass the message up to the RenderViewHost, until we have enough
+  // infrastructure to start processing messages in this object.
+  return render_view_host_->OnMessageReceived(msg);
+}
+
+}  // namespace content