[OLD ATTEMPT, DO NOT REVIEW] mustash: Enable connections to mus from the Chrome renderer

content/browser/render_process_connection_listener.cc

Index: content/browser/render_process_connection_listener.cc
diff --git a/content/browser/render_process_connection_listener.cc b/content/browser/render_process_connection_listener.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6d0344329cdf9e6cc7a51bab26087585a7fde6b6
--- /dev/null
+++ b/content/browser/render_process_connection_listener.cc
@@ -0,0 +1,89 @@
+// Copyright 2015 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/render_process_connection_listener.h"
+
+#include "base/logging.h"
+#include "base/macros.h"
+#include "components/mus/public/interfaces/window_tree.mojom.h"
+#include "content/browser/mojo/mojo_shell_client_host.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_mus.h"
+#include "content/common/render_process_client.mojom.h"
+#include "content/public/common/mojo_shell_connection.h"
+#include "mojo/application/public/cpp/application_connection.h"
+#include "mojo/application/public/cpp/interface_factory.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "url/gurl.h"
+
+namespace content {
+
+namespace {
+
+class RenderProcessConnection : public mojom::RenderProcessClient {
+ public:
+  RenderProcessConnection(
+      int render_process_id,
+      mojo::InterfaceRequest<mojom::RenderProcessClient> request)
+      : render_process_id_(render_process_id), binding_(this, request.Pass()) {}
+
+  ~RenderProcessConnection() override {}
+
+ private:
+  // mojom::RenderProcessClient implementation.
+  void OnRenderWidgetViewCreated(
+      uint32_t routing_id,
+      mus::mojom::WindowTreeClientPtr tree_client) override {
+    RenderViewHostImpl* rvh =
+        RenderViewHostImpl::FromID(render_process_id_, routing_id);
+    RenderWidgetHostViewMus* rwhvmus = rvh->GetWidget()->GetView()->AsMusView();
+    if (rwhvmus)
+      rwhvmus->Embed(tree_client.Pass());
+  }
+
+  const int render_process_id_;
+  mojo::StrongBinding<RenderProcessClient> binding_;
+  DISALLOW_COPY_AND_ASSIGN(RenderProcessConnection);
+};
+
+class RenderProcessConnectionListener
+    : public MojoShellConnection::Listener,
+      public mojo::InterfaceFactory<mojom::RenderProcessClient> {
+ public:
+  static void Create() { new RenderProcessConnectionListener; }
+
+ private:
+  RenderProcessConnectionListener() {
+    DCHECK(MojoShellConnection::Get());
+    MojoShellConnection::Get()->AddListener(this);
+  }
+
+  ~RenderProcessConnectionListener() override {}
+
+  // MojoShellConnection::Listener implementation:
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override {
+    connection->AddService<mojom::RenderProcessClient>(this);
+    return true;
+  }
+
+  // mojo::InterfaceFactory<mojom::RenderProcessClient>:
+  void Create(
+      mojo::ApplicationConnection* connection,
+      mojo::InterfaceRequest<mojom::RenderProcessClient> request) override {
+    int render_process_id = GetRenderProcessIDFromConnection(connection);
+    new RenderProcessConnection(render_process_id, request.Pass());
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(RenderProcessConnectionListener);
+};
+
+}  // namespace
+
+void CreateRenderProcessConnectionListener() {
+  RenderProcessConnectionListener::Create();
+}
+
+}  // namespace content