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

components/web_modal/web_contents_modal_dialog_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 
 #include <utility>
 
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "content/public/browser/navigation_details.h"
@@ skipping 53 matching lines @@
 }
 
 void WebContentsModalDialogManager::WillClose(gfx::NativeWindow dialog) {
   WebContentsModalDialogList::iterator dlg = FindDialogState(dialog);
 
   // The Views tab contents modal dialog calls WillClose twice.  Ignore the
   // second invocation.
   if (dlg == child_dialogs_.end())
     return;
 
+  nonclipped_child_dialogs_.erase(dialog);
   bool removed_topmost_dialog = dlg == child_dialogs_.begin();
   std::unique_ptr<DialogState> deleter(*dlg);
   child_dialogs_.erase(dlg);
   if (!child_dialogs_.empty() && removed_topmost_dialog &&
       !closing_all_dialogs_) {
     child_dialogs_.front()->manager->Show();
   }
 
   BlockWebContentsInteraction(!child_dialogs_.empty());
 }
 
+void WebContentsModalDialogManager::AddNonClippedDialog(
+    gfx::NativeWindow dialog) {
+  nonclipped_child_dialogs_.insert(dialog);
+}
+
+bool WebContentsModalDialogManager::IsNonClipped(
+    gfx::NativeWindow dialog) const {
+  return base::ContainsKey(nonclipped_child_dialogs_, dialog);
+}
+
 WebContentsModalDialogManager::WebContentsModalDialogManager(
     content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       delegate_(NULL),
       closing_all_dialogs_(false) {
 }
 
 WebContentsModalDialogManager::DialogState::DialogState(
     gfx::NativeWindow dialog,
     std::unique_ptr<SingleWebContentsDialogManager> mgr)
@@ skipping 74 matching lines @@
   // some of these to close.  CloseAllDialogs is async, so it might get called
   // twice before it runs.
   CloseAllDialogs();
 }
 
 void WebContentsModalDialogManager::DidAttachInterstitialPage() {
   CloseAllDialogs();
 }
 
 }  // namespace web_modal