Separate mojo/shell into a runner and the application manager (shell)

mojo/runner/task_runners.h

Index: mojo/runner/task_runners.h
diff --git a/mojo/shell/task_runners.h b/mojo/runner/task_runners.h
similarity index 91%
rename from mojo/shell/task_runners.h
rename to mojo/runner/task_runners.h
index 891d3e1bfe1fe8457e8e26c9846a4e1d1084ee8f..e09678cd82f30bf0442a4a3faab71a5b6de2e15c 100644
--- a/mojo/shell/task_runners.h
+++ b/mojo/runner/task_runners.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_TASK_RUNNERS_H_
-#define SHELL_TASK_RUNNERS_H_
+#ifndef MOJO_RUNNER_TASK_RUNNERS_H_
+#define MOJO_RUNNER_TASK_RUNNERS_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -50,4 +50,4 @@ class TaskRunners {
 }  // namespace shell
 }  // namespace mojo
 
-#endif  // SHELL_TASK_RUNNERS_H_
+#endif  // MOJO_RUNNER_TASK_RUNNERS_H_