Fix crash when dragging a half width window to split view from overivew mode

athena/wm/test/window_manager_impl_test_api.h

Index: athena/wm/test/window_manager_impl_test_api.h
diff --git a/athena/wm/test/window_manager_impl_test_api.h b/athena/wm/test/window_manager_impl_test_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..1876df3f4d7cc83964e8fc7cb19286983f8e76ad
--- /dev/null
+++ b/athena/wm/test/window_manager_impl_test_api.h
@@ -0,0 +1,34 @@
+// 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 ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_
+#define ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_
+
+#include "base/macros.h"
+
+namespace athena {
+class SplitViewController;
+class WindowListProvider;
+class WindowManagerImpl;
+
+namespace test {
+
+class WindowManagerImplTestApi {
+ public:
+  WindowManagerImplTestApi();
+  ~WindowManagerImplTestApi();
+
+  athena::WindowListProvider* GetWindowListProvider();
+  athena::SplitViewController* GetSplitViewController();
+
+ private:
+  athena::WindowManagerImpl* wm_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowManagerImplTestApi);
+};
+
+}  // namespace test
+}  // namespace athena
+
+#endif  // ATHENA_WM_TEST_WINDOW_MANAGER_IMPL_TEST_API_H_