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

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

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_mus.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_mus.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_mus.cc
index 191623f6bf01fc928474c4ff4af2bebeab841b3e..2ed2d89a6d52044c96766fa0059df0eef38d66a0 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_mus.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_mus.cc
@@ -226,6 +226,17 @@ void BrowserNonClientFrameViewMus::UpdateClientArea() {
   }
 }
 
+void BrowserNonClientFrameViewMus::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: