open new window in the same root window where the launcher was in

* Introduced ScopedRootWindowActivator to temporarily switch
active root window.


BUG=241571
TEST=covered by test

Review URL: https://chromiumcodereview.appspot.com/19945008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@215000 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 33 insertions, 0 deletions

diff --git a/ash/scoped_target_root_window.h b/ash/scoped_target_root_window.h
new file mode 100644
index 0000000..ab695be
--- /dev/null
+++ b/ash/scoped_target_root_window.h
@@ -0,0 +1,33 @@
+// Copyright 2013 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 ASH_SCOPED_TARGET_ROOT_WINDOW_H_
+#define ASH_SCOPED_TARGET_ROOT_WINDOW_H_
+
+#include "base/basictypes.h"
+
+namespace aura {
+class RootWindow;
+}
+
+namespace ash {
+namespace internal {
+
+// Constructing a ScopedTargetRootWindow allows temporarily
+// switching a target root window so that a new window gets created
+// in the same window where a user interaction happened.
+// An example usage is to specify the target root window when creating
+// a new window using launcher's icon.
+class ScopedTargetRootWindow {
+ public:
+  explicit ScopedTargetRootWindow(aura::RootWindow* root_window);
+  ~ScopedTargetRootWindow();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedTargetRootWindow);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SCOPED_TARGET_ROOT_WINDOW_H_