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

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index eb90f703da1de3a2675563723eaeaed6688d74fa..fefcc37425fbc391f7149dab76a411e51a341156 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -14,13 +14,16 @@
 #include "base/power_monitor/power_monitor.h"
 #include "base/sequenced_task_runner.h"
 #include "base/tracked_objects.h"
+#include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "content/child/mojo/mojo_application.h"
 #include "content/common/content_export.h"
 #include "content/common/message_router.h"
 #include "content/common/mojo/channel_init.h"
 #include "content/public/child/child_thread.h"
+#include "content/public/common/mojo_shell_connection.h"
 #include "ipc/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
 #include "ipc/ipc_platform_file.h"
+#include "mojo/application/public/cpp/interface_factory.h"
 
 namespace base {
 class MessageLoop;
@@ -64,6 +67,8 @@ struct RequestInfo;
 // The main thread of a child process derives from this class.
 class CONTENT_EXPORT ChildThreadImpl
     : public IPC::Listener,
+      public MojoShellConnection::Listener,
+      public mojo::InterfaceFactory<mus::mojom::WindowTreeClient>,
       virtual public ChildThread {
  public:
   struct CONTENT_EXPORT Options;
@@ -203,6 +208,15 @@ class CONTENT_EXPORT ChildThreadImpl
   void OnChannelConnected(int32 peer_pid) override;
   void OnChannelError() override;
 
+  // MojoShellConnection::Listener implementation:
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override;
+
+  // mojo::InterfaceFactory<mojom::WindowTreeClient> implementation.
+  void Create(
+      mojo::ApplicationConnection* connection,
+      mojo::InterfaceRequest<mus::mojom::WindowTreeClient> request) override;
+
   bool IsInBrowserProcess() const;
   scoped_refptr<base::SequencedTaskRunner> GetIOTaskRunner();