Changes view manager test to connect via shell

mojo/shell/shell_test_helper.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 MOJO_SHELL_SHELL_TEST_HELPER_
+#define MOJO_SHELL_SHELL_TEST_HELPER_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "base/threading/thread.h"
+#include "mojo/public/cpp/bindings/remote_ptr.h"
+#include "mojo/public/cpp/environment/environment.h"
+#include "mojo/public/interfaces/shell/shell.mojom.h"
+
+namespace base {
+class MessageLoopProxy;
+class RunLoop;
+}
+
+namespace mojo {
+namespace shell {
+
+// ShellTestHelper is useful for tests to establish a connection to the Shell.
+// ShellTestHelper does this by spawning a thread and connecting. Invoke Init()
+// to do this. Once done, shell() returns the handle to the Shell.
+class ShellTestHelper {
+ public:
+  struct State;
+
+  ShellTestHelper();
+  ~ShellTestHelper();
+
+  void Init();
+
+  // Returns a handle to the Shell. ShellTestHelper owns the shell.
+  Shell* shell() { return shell_.get(); }
+
+ private:
+  class TestShellClient;
+
+  // Invoked once connection has been established.
+  void OnShellStarted();
+
+  Environment environment_;
+
+  base::Thread shell_thread_;
+
+  // If non-null we're in Init() and waiting for connection.
+  scoped_ptr<base::RunLoop> run_loop_;
+
+  // See comment in declaration for details.
+  State* state_;
+
+  // Client interface for the shell.
+  scoped_ptr<TestShellClient> shell_client_;
+
+  RemotePtr<Shell> shell_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShellTestHelper);
+};
+
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // MOJO_SHELL_SHELL_TEST_HELPER_