Added restore functionality for maximize full/left/right

ash/wm/workspace/workspace_event_filter.cc

Index: ash/wm/workspace/workspace_event_filter.cc
diff --git a/ash/wm/workspace/workspace_event_filter.cc b/ash/wm/workspace/workspace_event_filter.cc
index 0865beb3ac71fc97019414a507e0f8c7cfcdd841..86ef404531e43dcc929d3b05199981738cbf3eb8 100644
--- a/ash/wm/workspace/workspace_event_filter.cc
+++ b/ash/wm/workspace/workspace_event_filter.cc
@@ -37,19 +37,6 @@ void SingleAxisUnmaximize(aura::Window* window,
   window->ClearProperty(aura::client::kRestoreBoundsKey);
 }
 
-void ToggleMaximizedState(aura::Window* window) {
-  if (GetRestoreBoundsInScreen(window)) {
-    if (window->GetProperty(aura::client::kShowStateKey) ==
-        ui::SHOW_STATE_NORMAL) {
-      window->SetBounds(GetRestoreBoundsInParent(window));
-    } else {
-      window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_NORMAL);
-    }
-  } else {
-    window->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
-  }
-}
-
 }  // namespace
 
 namespace internal {
@@ -86,7 +73,7 @@ bool WorkspaceEventFilter::PreHandleMouseEvent(aura::Window* target,
           HTCAPTION) {
         bool destroyed = false;
         destroyed_ = &destroyed;
-        ToggleMaximizedState(target);
+        ash::wm::ToggleMaximizedState(target);
         if (destroyed)
           return false;
         destroyed_ = NULL;
@@ -107,7 +94,7 @@ ui::GestureStatus WorkspaceEventFilter::PreHandleGestureEvent(
   if (event->type() == ui::ET_GESTURE_DOUBLE_TAP &&
       target->delegate()->GetNonClientComponent(event->location()) ==
       HTCAPTION) {
-    ToggleMaximizedState(target);  // |this| may be destroyed from here.
+    ash::wm::ToggleMaximizedState(target);  // |this| may be destroyed here.
     return ui::GESTURE_STATUS_CONSUMED;
   }
   return ToplevelWindowEventFilter::PreHandleGestureEvent(target, event);