[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..3ebb3d056da37cb8cb8a6d7a5bbcc296368117fb 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:
 
@@ -336,7 +347,8 @@ gfx::Size BrowserNonClientFrameViewMus::GetMinimumSize() const {
         std::max(min_width, min_tabstrip_width + GetTabStripLeftInset() +
                                 GetTabStripRightInset());
   }
-  return gfx::Size(min_width, min_client_view_size.height());
+  gfx::Size min_size(min_width, min_client_view_size.height());
+  return min_size;
 }
 
 ///////////////////////////////////////////////////////////////////////////////