Added restore functionality for maximize full/left/right

ash/wm/workspace/workspace_layout_manager2.cc

 // Copyright (c) 2012 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.
 
 #include "ash/wm/workspace/workspace_layout_manager2.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "ash/screen_ash.h"
 #include "ash/wm/always_on_top_controller.h"
@@ skipping 118 matching lines @@
                                                       intptr_t old) {
   if (key == aura::client::kShowStateKey) {
     ui::WindowShowState old_state = static_cast<ui::WindowShowState>(old);
     ui::WindowShowState new_state =
         window->GetProperty(aura::client::kShowStateKey);
     if (old_state == ui::SHOW_STATE_MINIMIZED) {
       window->layer()->SetOpacity(1.0f);
       window->layer()->SetTransform(ui::Transform());
     }
     if (old_state != ui::SHOW_STATE_MINIMIZED &&
+        GetRestoreBoundsInScreen(window) == NULL &&
         WorkspaceManager2::IsMaximizedState(new_state) &&
         !WorkspaceManager2::IsMaximizedState(old_state)) {
       SetRestoreBoundsInParent(window, window->bounds());
     }
 
     // If maximizing or restoring, clone the layer. WorkspaceManager will use it
     // (and take overship of it) when animating. Ideally we could use that of
     // BaseLayoutManager, but that proves problematic. In particular when
     // restoring we need to animate on top of the workspace animating in.
     ui::Layer* cloned_layer = NULL;
@@ skipping 124 matching lines @@
   }
   return false;
 }
 
 WorkspaceManager2* WorkspaceLayoutManager2::workspace_manager() {
   return workspace_->workspace_manager();
 }
 
 }  // namespace internal
 }  // namespace ash