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

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

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
index 5d68c5024279e06f98fd2449a8e6fe232d103d5b..06c3b5d2e62e2a4f3dd8f031235f66ec1048df06 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
@@ -170,6 +170,17 @@ void BrowserNonClientFrameViewAsh::UpdateThrobber(bool running) {
     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: