Fix platform_viewport_x11 so that window is initially shown

services/native_viewport/platform_viewport_x11.cc

Index: services/native_viewport/platform_viewport_x11.cc
diff --git a/services/native_viewport/platform_viewport_x11.cc b/services/native_viewport/platform_viewport_x11.cc
index d45215085cebfb319776115d44dadcebeb888ead..c77f413e4fc42819e7a703788c5f7f97a9c4f06f 100644
--- a/services/native_viewport/platform_viewport_x11.cc
+++ b/services/native_viewport/platform_viewport_x11.cc
@@ -54,6 +54,9 @@ class PlatformViewportX11 : public PlatformViewport,
 
     platform_window_.reset(new ui::X11Window(this));
     platform_window_->SetBounds(bounds);
+
+    // X11 window isn't created until explicitly shown
+    Show();
   }
 
   void Show() override { platform_window_->Show(); }