Created min size for print preview dialog and modified to allow the

chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc

Index: chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc
diff --git a/chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc b/chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc
index 9894085a151844d9710fa30b7e3c4bbe1dbb68b1..5161d8747f2c4451a36b22f4f901f2add35a8dab 100644
--- a/chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc
+++ b/chrome/browser/ui/views/native_web_contents_modal_dialog_manager_views.cc
@@ -77,6 +77,11 @@ void NativeWebContentsModalDialogManagerViews::ManageDialog() {
 
   wm::SetModalParent(widget->GetNativeWindow(),
                      native_delegate_->GetWebContents()->GetNativeView());
+
+  if (native_delegate_->IsNonClipped(dialog())) {

[Mike Wittman, 2016/08/12 22:51:34]

We should only enable this code on the platforms where
wm::kHasIndependentBoundsKey is supported. Setting the property in cases where
it has no effect will be confusing to anyone looking at the native window
properties while debugging.

[rbpotter, 2016/08/15 18:03:45]

Done.

+    widget->SetNativeWindowProperty(wm::kHasIndependentBoundsKey,
+                                    new bool(true));

[Mike Wittman, 2016/08/12 22:51:34]

For ease of use and to avoid leaking memory, I would encode the truth value in
the property value itself: reinterpret_cast<void*>(true).

Then users can directly check the property value:
if (widget->GetNativeWindowProperty(wm::kHasIndependentBoundsKey)) {
  // ...
}

[rbpotter, 2016/08/15 18:03:45]

Done.

+  }
 #endif
 }