Adds plumbing to pass WebUI mojo::Handle from browser to renderer

content/browser/renderer_host/render_process_host_mojo_impl.h

+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_MOJO_IMPL_H_
+#define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_MOJO_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/process/process_handle.h"
+#include "content/common/mojo/render_process.mojom.h"
+#include "mojo/public/bindings/remote_ptr.h"
+
+namespace content {
+
+class MojoChannelInit;
+class RenderProcessHost;
+
+// RenderProcessHostMojoImpl implements RenderProcessHostMojo. Additionally

[darin (slow to review), 2014/03/21 00:04:52]

nit: this first sentence can be deleted as it is pretty clear from the code.

[sky, 2014/03/21 03:19:16]

Done.

+// it is responsible for initiating the connection with the content side.
+class RenderProcessHostMojoImpl : public RenderProcessHostMojo {
+ public:
+  explicit RenderProcessHostMojoImpl(RenderProcessHost* host);
+  virtual ~RenderProcessHostMojoImpl();
+
+  void SetWebUIHandle(int32 view_routing_id, mojo::ScopedHandle handle);
+
+  // Invoked when the RenderPorcessHost has established a channel.
+  void OnProcessLaunched();
+
+private:
+  struct PendingHandle;
+
+  // Establishes the mojo channel to the renderer.
+  void CreateMojoChannel(base::ProcessHandle process_handle);
+
+  RenderProcessHost* host_;
+
+  // Used to establish the connection.
+  scoped_ptr<MojoChannelInit> mojo_channel_init_;
+
+  mojo::RemotePtr<content::RenderProcessMojo> render_process_mojo_;
+
+  // If non-null we're waiting to send a WebUI handle to the renderer when
+  // connected.
+  scoped_ptr<PendingHandle> pending_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderProcessHostMojoImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_MOJO_IMPL_H_