Create constrained windows in a hidden state.

views/widget/native_widget_win.cc

Index: views/widget/native_widget_win.cc
diff --git a/views/widget/native_widget_win.cc b/views/widget/native_widget_win.cc
index 92b83eaa3b4870599180cfeba7ce90e3af5d7fa9..9d813b9dab8e67d399da4214a286304752e836e8 100644
--- a/views/widget/native_widget_win.cc
+++ b/views/widget/native_widget_win.cc
@@ -934,6 +934,8 @@ bool NativeWidgetWin::IsVisible() const {
 void NativeWidgetWin::Activate() {
   if (IsMinimized())
     ::ShowWindow(GetNativeView(), SW_RESTORE);
+  else if (!IsVisible())
+    Show();
   ::SetWindowPos(GetNativeView(), HWND_TOP, 0, 0, 0, 0,
                  SWP_NOSIZE | SWP_NOMOVE);
   SetForegroundWindow(GetNativeView());
@@ -2237,7 +2239,7 @@ void NativeWidgetWin::SetInitParams(const Widget::InitParams& params) {
 
   // Set type-independent style attributes.
   if (params.child)
-    style |= WS_CHILD | WS_VISIBLE;
+    style |= WS_CHILD;
   if (params.show_state == ui::SHOW_STATE_MAXIMIZED)
     style |= WS_MAXIMIZE;
   if (params.show_state == ui::SHOW_STATE_MINIMIZED)
@@ -2280,6 +2282,7 @@ void NativeWidgetWin::SetInitParams(const Widget::InitParams& params) {
       break;
     }
     case Widget::InitParams::TYPE_CONTROL:
+      style |= WS_VISIBLE;
       break;
     case Widget::InitParams::TYPE_WINDOW_FRAMELESS:
       style |= WS_POPUP;