Do not disable minimize animation for maximized/fullscreened exo windows

components/exo/shell_surface.cc

 // Copyright 2015 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 "components/exo/shell_surface.h"
 
 #include <algorithm>
 
 #include "ash/common/frame/custom_frame_view_ash.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 906 matching lines @@
   return gfx::Size(1, 1);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ash::wm::WindowStateObserver overrides:
 
 void ShellSurface::OnPreWindowStateTypeChange(
     ash::wm::WindowState* window_state,
     ash::wm::WindowStateType old_type) {
   ash::wm::WindowStateType new_type = window_state->GetStateType();
+  if (old_type == ash::wm::WINDOW_STATE_TYPE_MINIMIZED ||
+      new_type == ash::wm::WINDOW_STATE_TYPE_MINIMIZED) {
+    return;
+  }
+
   if (ash::wm::IsMaximizedOrFullscreenOrPinnedWindowStateType(old_type) ||
       ash::wm::IsMaximizedOrFullscreenOrPinnedWindowStateType(new_type)) {
     // When transitioning in/out of maximized or fullscreen mode we need to
     // make sure we have a configure callback before we allow the default
     // cross-fade animations. The configure callback provides a mechanism for
     // the client to inform us that a frame has taken the state change into
     // account and without this cross-fade animations are unreliable.
 
     // TODO(domlaskowski): For shell surfaces whose bounds are controlled by the
     // client, the configure callback does not yet support window state changes.
@@ skipping 679 matching lines @@
     // small style shadow for them.
     if (!activatable_)
       shadow->SetElevation(wm::ShadowElevation::SMALL);
     // We don't have rounded corners unless frame is enabled.
     if (!frame_enabled_)
       shadow->SetRoundedCornerRadius(0);
   }
 }
 
 }  // namespace exo