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

components/web_modal/web_contents_modal_dialog_manager.h

 // Copyright 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.
 
 #ifndef COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_MANAGER_H_
 #define COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_MANAGER_H_
 
 #include <deque>
 #include <memory>
 
@@ skipping 19 matching lines @@
   void SetDelegate(WebContentsModalDialogManagerDelegate* d);
 
   static SingleWebContentsDialogManager* CreateNativeWebModalManager(
       gfx::NativeWindow dialog,
       SingleWebContentsDialogManagerDelegate* native_delegate);
 
   // Shows the dialog as a web contents modal dialog. The dialog will notify via
   // WillClose() when it is being destroyed.
   void ShowModalDialog(gfx::NativeWindow dialog);
 
+  // Shows the dialog as a non clipped web contents modal dialog. The dialog
+  // will be able to extend outside the bounds of the parent window on platforms
+  // where this is allowed. The dialog will notify via WillClose() when it is
+  // being destroyed.
+  void ShowNonClippedModalDialog(gfx::NativeWindow dialog);
+
   // Allow clients to supply their own native dialog manager. Suitable for
   // bubble clients.
   void ShowDialogWithManager(
       gfx::NativeWindow dialog,
       std::unique_ptr<SingleWebContentsDialogManager> manager);
 
   // Returns true if any dialogs are active and not closed.
   bool IsDialogActive() const;
 
   // Focus the topmost modal dialog.  IsDialogActive() must be true when calling
   // this function.
   void FocusTopmostDialog() const;
 
   // SingleWebContentsDialogManagerDelegate:
   content::WebContents* GetWebContents() const override;
   void WillClose(gfx::NativeWindow dialog) override;
+  bool IsNonClipped(gfx::NativeWindow dialog) override;
 
   // For testing.
   class TestApi {
    public:
     explicit TestApi(WebContentsModalDialogManager* manager)
         : manager_(manager) {}
 
     void CloseAllDialogs() { manager_->CloseAllDialogs(); }
     void DidAttachInterstitialPage() { manager_->DidAttachInterstitialPage(); }
     void WebContentsWasShown() { manager_->WasShown(); }
@@ skipping 12 matching lines @@
   struct DialogState {
     DialogState(gfx::NativeWindow dialog,
                 std::unique_ptr<SingleWebContentsDialogManager> manager);
     ~DialogState();
 
     gfx::NativeWindow dialog;
     std::unique_ptr<SingleWebContentsDialogManager> manager;
   };
 
   typedef std::deque<DialogState*> WebContentsModalDialogList;
+  typedef std::deque<gfx::NativeWindow> NativeWindowDialogList;

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

std::set would be better given how this is used. Also unless you have a specific
reason for it, this shouldn't have a typedef. The existing typedef is a legacy
of pre-auto C++.

[rbpotter, 2016/08/15 18:03:46]

Done.

 
   // Utility function to get the dialog state for a dialog.
   WebContentsModalDialogList::iterator FindDialogState(
       gfx::NativeWindow dialog);
 
   // Blocks/unblocks interaction with renderer process.
   void BlockWebContentsInteraction(bool blocked);
 
   bool IsWebContentsVisible() const;
 
   // Closes all WebContentsModalDialogs.
   void CloseAllDialogs();
 
   // Overridden from content::WebContentsObserver:
   void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) override;
   void DidGetIgnoredUIEvent() override;
   void WasShown() override;
   void WasHidden() override;
   void WebContentsDestroyed() override;
   void DidAttachInterstitialPage() override;
 
   // Delegate for notifying our owner about stuff. Not owned by us.
   WebContentsModalDialogManagerDelegate* delegate_;
 
   // All active dialogs.
   WebContentsModalDialogList child_dialogs_;
 
+  // All non clipped active dialogs.
+  NativeWindowDialogList nonclipped_child_dialogs_;
+
   // True while closing the dialogs on WebContents close.
   bool closing_all_dialogs_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsModalDialogManager);
 };
 
 }  // namespace web_modal
 
 #endif  // COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_MANAGER_H_