Split Screen mode implementation

athena/wm/window_list_provider.h

Index: athena/wm/window_list_provider.h
diff --git a/athena/wm/window_list_provider.h b/athena/wm/window_list_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..39a12119e2e04171d34a73b5a0f219e1a421c1bf
--- /dev/null
+++ b/athena/wm/window_list_provider.h
@@ -0,0 +1,21 @@
+#ifndef ATHENA_WM_WINDOW_LIST_PROVIDER_H_
+#define ATHENA_WM_WINDOW_LIST_PROVIDER_H_
+
+#include "ui/aura/window.h"
+
+namespace athena {
+
+// Interface for an ordered list of aura::Window objects.

[Jun Mukai, 2014/08/05 21:13:38]

This would be good to share the interface among ash eventually.
Can you move this to ui/wm/core?

[mfomitchev, 2014/08/06 18:11:32]

Done.

+class WindowListProvider {
+ public:
+  virtual ~WindowListProvider() {}
+
+  // Returns an ordered list of windows.
+  virtual aura::Window::Windows GetWindowList() = 0;
+  // Moves the window to the front of the list.
+  virtual void MoveToFront(aura::Window* window) = 0;
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_WM_WINDOW_LIST_PROVIDER_H_