Hook embedded shell up to MojoShellConnection

mojo/shell/runner/child/runner_connection.h

 // 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.
 
 #ifndef MOJO_SHELL_RUNNER_CHILD_RUNNER_CONNECTION_H_
 #define MOJO_SHELL_RUNNER_CHILD_RUNNER_CONNECTION_H_
 
 #include "base/macros.h"
 #include "mojo/shell/public/interfaces/shell_client.mojom.h"
 
 namespace mojo {
 namespace shell {
 
 // Encapsulates a connection to a runner process. The connection object starts a
 // background controller thread that is used to receive control messages from
 // the runner. When this object is destroyed the thread is joined.
 class RunnerConnection {
  public:
   virtual ~RunnerConnection();
 
   // Establish a connection to the runner, blocking the calling thread until
   // it is established. The Application request from the runner is returned via
   // |request|.
+  //
   // If a connection to the runner cannot be established, |request| will not be
   // modified and this function will return null.
+  //
+  // If |exit_on_error| is true, the calling process will be terminated in the
+  // event of an error on |handle|.
+  //
+  // TODO(rockot): Remove |exit_on_error| when it's safe for all clients to be
+  // terminated on such errors. For now we don't want this killing content's
+  // child processes.
   static RunnerConnection* ConnectToRunner(
       InterfaceRequest<mojom::ShellClient>* request,
-      ScopedMessagePipeHandle handle);
+      ScopedMessagePipeHandle handle,
+      bool exit_on_error = true);
 
  protected:
   RunnerConnection();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RunnerConnection);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_RUNNER_CHILD_RUNNER_CONNECTION_H_