harmony: fix sizing on webusb chooser dialog

chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc

Index: chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc
diff --git a/chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc b/chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc
index 9addbb159e720ef07e16f56a3dee5bbbcecc0fbe..0190178ae3964962f979a4fe5734e8e08914f25b 100644
--- a/chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc
+++ b/chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.cc
@@ -18,6 +18,7 @@
 #include "chrome/browser/ui/views/exclusive_access_bubble_views.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/frame/top_container_view.h"
+#include "chrome/browser/ui/views/harmony/layout_delegate.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
 #include "chrome/browser/ui/views/location_bar/location_icon_view.h"
 #include "chrome/browser/ui/website_settings/chooser_bubble_delegate.h"
@@ -54,6 +55,7 @@ class ChooserBubbleUiViewDelegate : public views::BubbleDialogDelegateView,
   bool Accept() override;
   bool Cancel() override;
   bool Close() override;
+  gfx::Size GetMinimumSize() const override;
 
   // views::DialogDelegateView:
   views::View* GetContentsView() override;
@@ -142,6 +144,16 @@ bool ChooserBubbleUiViewDelegate::Close() {
   return true;
 }
 
+gfx::Size ChooserBubbleUiViewDelegate::GetMinimumSize() const {
+  constexpr int kHeight = 320;
+  constexpr int kDefaultWidth = 402;
+  int width = LayoutDelegate::Get()->GetDialogPreferredWidth(
+      LayoutDelegate::DialogWidth::MEDIUM);
+  if (!width)
+    width = kDefaultWidth;
+  return gfx::Size(width, kHeight);
+}
+
 views::View* ChooserBubbleUiViewDelegate::GetContentsView() {
   return device_chooser_content_view_;
 }