[Reland] Enable AutoResize for Constrained Web Dialogs for Mac.

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_
 #define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_
 
 #import <Cocoa/Cocoa.h>
 
+#include "base/mac/scoped_nsobject.h"
+#include "components/web_modal/web_contents_modal_dialog_manager.h"
+
 namespace content {
 class WebContents;
 }
 class ConstrainedWindowMac;
 class SingleWebContentsDialogManagerCocoa;
 @protocol ConstrainedWindowSheet;
 
 // A delegate for a constrained window. The delegate is notified when the
 // window closes.
 class ConstrainedWindowMacDelegate {
  public:
   virtual void OnConstrainedWindowClosed(ConstrainedWindowMac* window) = 0;
 };
 
+// Creates a ConstrainedWindowMac, shows the dialog, and returns it.
+ConstrainedWindowMac* CreateAndShowWebModalDialogMac(

[Nico, 2016/02/05 15:31:10]

i mean this should return a unique_ptr, so that it's impossible to use this
wrong

[apacible, 2016/02/05 21:40:41]

Done.

[Nico, 2016/02/05 21:52:40]

Sorry, returning a scoped_ptr would've been ok too and would've been less churn
for you. Should've been more clear -- the idea was just to make it impossible to
use this function and accidentally leak the return value.

+    ConstrainedWindowMacDelegate* delegate,
+    content::WebContents* web_contents,
+    id<ConstrainedWindowSheet> sheet);
+
+// Creates a ConstrainedWindowMac and returns it.
+ConstrainedWindowMac* CreateWebModalDialogMac(

[Nico, 2016/02/05 15:31:10]

this too

[apacible, 2016/02/05 21:40:41]

Done.

+    ConstrainedWindowMacDelegate* delegate,
+    content::WebContents* web_contents,
+    id<ConstrainedWindowSheet> sheet);
+
 // Constrained window implementation for Mac.
 // Normally an instance of this class is owned by the delegate. The delegate
 // should delete the instance when the window is closed.
 class ConstrainedWindowMac {
  public:
   ConstrainedWindowMac(ConstrainedWindowMacDelegate* delegate,
                        content::WebContents* web_contents,
                        id<ConstrainedWindowSheet> sheet);
   ~ConstrainedWindowMac();
 
+  // Shows the constrained window.
+  void ShowWebContentsModalDialog();
+
   // Closes the constrained window.
   void CloseWebContentsModalDialog();
 
   SingleWebContentsDialogManagerCocoa* manager() const { return manager_; }
   void set_manager(SingleWebContentsDialogManagerCocoa* manager) {
     manager_ = manager;
   }
+  id<ConstrainedWindowSheet> sheet() const { return sheet_.get(); }
 
   // Called by |manager_| when the dialog is closing.
   void OnDialogClosing();
 
+  // Whether or not the dialog was shown. If the dialog is auto-resizable, it
+  // is hidden until its WebContents initially loads.
+  bool DialogWasShown();
+
+  // Gets the dialog manager for |web_contents_|.
+  web_modal::WebContentsModalDialogManager* GetDialogManager();
+
  private:
   ConstrainedWindowMacDelegate* delegate_;  // weak, owns us.
   SingleWebContentsDialogManagerCocoa* manager_;  // weak, owned by WCMDM.
+  content::WebContents* web_contents_;  // weak, owned by dialog initiator.
+  base::scoped_nsprotocol<id<ConstrainedWindowSheet>> sheet_;
+  scoped_ptr<SingleWebContentsDialogManagerCocoa> native_manager_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_