Improving window auto management between workspaces

ash/wm/workspace/workspace_manager2.cc

Index: ash/wm/workspace/workspace_manager2.cc
diff --git a/ash/wm/workspace/workspace_manager2.cc b/ash/wm/workspace/workspace_manager2.cc
index 148ca71485c3f19caf020f2681b22bc3c4e8a4e7..502ffedddcb29900456ff819ffd0416a804b5705 100644
--- a/ash/wm/workspace/workspace_manager2.cc
+++ b/ash/wm/workspace/workspace_manager2.cc
@@ -17,6 +17,7 @@
 #include "ash/wm/window_animations.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_util.h"
+#include "ash/wm/workspace/auto_window_management.h"
 #include "ash/wm/workspace/desktop_background_fade_controller.h"
 #include "ash/wm/workspace/workspace_animations.h"
 #include "ash/wm/workspace/workspace_layout_manager2.h"
@@ -597,10 +598,13 @@ void WorkspaceManager2::OnWindowAddedToWorkspace(Workspace2* workspace,
   // to the workspace.
   if (workspace == active_workspace_)
     UpdateShelfVisibility();
+
+  RearrangeVisibleWindowOnShow(child);
 }
 
 void WorkspaceManager2::OnWillRemoveWindowFromWorkspace(Workspace2* workspace,
                                                         Window* child) {
+  RearrangeVisibleWindowOnHide(child);
   child->ClearProperty(kWorkspaceKey);
 }
 
@@ -613,10 +617,16 @@ void WorkspaceManager2::OnWindowRemovedFromWorkspace(Workspace2* workspace,
 void WorkspaceManager2::OnWorkspaceChildWindowVisibilityChanged(
     Workspace2* workspace,
     Window* child) {
-  if (workspace->ShouldMoveToPending())
+  if (workspace->ShouldMoveToPending()) {
     MoveWorkspaceToPendingOrDelete(workspace, NULL, SWITCH_VISIBILITY_CHANGED);
-  else if (workspace == active_workspace_)
-    UpdateShelfVisibility();
+  } else {
+    if (child->TargetVisibility())
+      RearrangeVisibleWindowOnShow(child);
+    else
+      RearrangeVisibleWindowOnHide(child);
+    if (workspace == active_workspace_)
+      UpdateShelfVisibility();
+  }
 }
 
 void WorkspaceManager2::OnWorkspaceWindowChildBoundsChanged(