[Mac] Enable MacViews site settings bubble behind --enable-mac-views-dialogs.

chrome/browser/ui/views/browser_dialogs_views_mac.cc

+// Copyright 2015 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 "chrome/browser/ui/browser_dialogs.h"
+
+#include "chrome/browser/ui/views/website_settings/website_settings_popup_view.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "ui/views/widget/widget_observer.h"
+
+// This file provides definitions of desktop browser dialog-creation methods for
+// Mac where a Cocoa browser is using Views dialogs.
+
+namespace {
+
+// Creates an anchor view for a bubble and deletes it when the bubble is closed.
+// It also closes the bubble when the parent WebContents is destroyed since the
+// anchor view does not have its own Widget for the BubbleDelegateView to
+// observe. Owns itself.
+class BubbleAnchorViewAdapter : public views::WidgetObserver,
+                                public content::WebContentsObserver {
+ public:
+  BubbleAnchorViewAdapter(const gfx::Point& anchor_point,
+                          Profile* profile,
+                          content::WebContents* web_contents,
+                          const GURL& url,
+                          const content::SSLStatus& ssl)
+      : anchor_view_(new views::View) {
+    // Since the view doesn't have a container Widget,
+    // View::ConvertPointToScreen will assume its origin is 0,0. Create a rect
+    // where the midpoint of the bottom edge is at the anchor point.
+    anchor_view_->SetBounds(
+        0, 0, anchor_point.x() * 2,

[tapted, 2015/08/11 03:20:37]

ooh - I just realised something... What happens in a dual-screen setup, and it
shows on a screen to the left of the menubar. I think anchor_point.x will be
negative in this case.

[tapted, 2015/08/11 03:45:42]

lgtm with a comment about the dual-screen thing (here and in the CL
description), and a TODO here.

Maybe msw has some ideas for an alternative fix

[jackhou1, 2015/08/11 03:54:02]

Done.

+        anchor_point.y() +
+            WebsiteSettingsPopupView::kLocationIconVerticalMargin);
+    views::BubbleDelegateView* bubble_view =
+        WebsiteSettingsPopupView::ShowPopup(anchor_view_.get(), profile,
+                                            web_contents, url, ssl);
+
+    widget_ = bubble_view->GetWidget();
+    widget_->AddObserver(this);
+    Observe(web_contents);
+  }
+
+  ~BubbleAnchorViewAdapter() override {}
+
+  // WidgetObserver:
+  void OnWidgetDestroyed(views::Widget* widget) override { delete this; }
+
+  // content::WebContentsObserver:
+  void WebContentsDestroyed() override { widget_->Close(); }
+
+ private:
+  // This view should never be (or have been) inserted into a view heirarchy.
+  scoped_ptr<views::View> anchor_view_;
+  views::Widget* widget_;
+
+  DISALLOW_COPY_AND_ASSIGN(BubbleAnchorViewAdapter);
+};
+
+}  // namespace
+
+namespace chrome {
+
+void ShowWebsiteSettingsBubbleViewsAtPoint(const gfx::Point& anchor_point,
+                                           Profile* profile,
+                                           content::WebContents* web_contents,
+                                           const GURL& url,
+                                           const content::SSLStatus& ssl) {
+  new BubbleAnchorViewAdapter(anchor_point, profile, web_contents, url, ssl);
+}
+
+}  // namespace chrome