[mus+ash] Fixes minimum browser window size (store / retrieve kPreferredSize property)

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc

 // Copyright 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 "chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.h"
 
 #include <algorithm>
 
 #include "ash/ash_layout_constants.h"
 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
@@ skipping 152 matching lines @@
 
 int BrowserNonClientFrameViewAsh::GetThemeBackgroundXInset() const {
   return ash::HeaderPainterUtil::GetThemeBackgroundXInset();
 }
 
 void BrowserNonClientFrameViewAsh::UpdateThrobber(bool running) {
   if (window_icon_)
     window_icon_->Update();
 }
 
+void BrowserNonClientFrameViewAsh::UpdateMinimumSize() {
+  gfx::Size min_size = GetMinimumSize();
+  aura::Window* frame_window = frame()->GetNativeWindow();
+  const gfx::Size* previous_min_size =
+      frame_window->GetProperty(aura::client::kMinimumSize);
+  if (!previous_min_size || *previous_min_size != min_size) {
+    frame_window->SetProperty(aura::client::kMinimumSize,
+                              new gfx::Size(min_size));
+  }
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // views::NonClientFrameView:
 
 gfx::Rect BrowserNonClientFrameViewAsh::GetBoundsForClientView() const {
   // The ClientView must be flush with the top edge of the widget so that the
   // web contents can take up the entire screen in immersive fullscreen (with
   // or without the top-of-window views revealed). When in immersive fullscreen
   // and the top-of-window views are revealed, the TopContainerView paints the
   // window header by redirecting paints from its background to
   // BrowserNonClientFrameViewAsh.
@@ skipping 264 matching lines @@
                                  toolbar_bounds.width(), 0);
   BrowserView::Paint1pxHorizontalLine(canvas, GetToolbarTopSeparatorColor(),
                                       separator_rect, true);
 
   // Toolbar/content separator.
   toolbar_bounds.Inset(kClientEdgeThickness, 0);
   BrowserView::Paint1pxHorizontalLine(
       canvas, tp->GetColor(ThemeProperties::COLOR_TOOLBAR_BOTTOM_SEPARATOR),
       toolbar_bounds, true);
 }