Added restore functionality for maximize full/left/right

ash/wm/workspace/frame_maximize_button.h

Index: ash/wm/workspace/frame_maximize_button.h
diff --git a/ash/wm/workspace/frame_maximize_button.h b/ash/wm/workspace/frame_maximize_button.h
index 9041a9b3983bad3b26d005400e239dd2d341570e..8bd551eee49ebd066001bc1a52db874f53f280c5 100644
--- a/ash/wm/workspace/frame_maximize_button.h
+++ b/ash/wm/workspace/frame_maximize_button.h
@@ -6,6 +6,7 @@
 #define ASH_WM_WORKSPACE_FRAME_MAXIMIZE_BUTTON_H_
 
 #include "ash/ash_export.h"
+#include "ash/wm/workspace/maximize_bubble_frame_state.h"
 #include "ash/wm/workspace/snap_types.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
@@ -117,6 +118,9 @@ class ASH_EXPORT FrameMaximizeButton : public views::ImageButton,
   // Snaps the window to the current snap position.
   void Snap(const internal::SnapSizer& snap_sizer);
 
+  // Determine the maximize type of this window.
+  MaximizeBubbleFrameState GetMaximizeBubbleFrameState() const;
+
   // Frame that the maximize button acts on.
   views::NonClientFrameView* frame_;