Mac: Convert all the TabDialogs to Harmony

chrome/browser/ui/cocoa/tab_dialogs_views_mac.mm

+// Copyright 2016 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/views/tab_dialogs_views.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "chrome/browser/ui/cocoa/tab_dialogs_cocoa.h"
+#include "content/public/browser/web_contents.h"
+
+namespace {
+
+// Implementation of TabDialogs interface for toolkit-views dialogs on Mac.
+class TabDialogsViewsMac : public TabDialogsViews {
+ public:
+  explicit TabDialogsViewsMac(content::WebContents* contents);
+  ~TabDialogsViewsMac() override {}
+
+  // TabDialogs:
+  gfx::NativeView GetDialogParentView() const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TabDialogsViewsMac);
+};
+
+TabDialogsViewsMac::TabDialogsViewsMac(content::WebContents* contents)
+    : TabDialogsViews(contents) {}
+
+// The browser is still Cocoa, so this matches TabDialogsCocoa.
+gfx::NativeView TabDialogsViewsMac::GetDialogParentView() const {
+  // View hierarchy of the contents view:
+  // NSView  -- switchView, same for all tabs
+  // +- TabContentsContainerView  -- TabContentsController's view
+  //    +- WebContentsViewCocoa
+  //
+  // Changing it? Do not forget to modify
+  // -[TabStripController swapInTabAtIndex:] too.
+  return [web_contents()->GetNativeView() superview];
+}
+
+}  // namespace
+
+// static
+TabDialogs* TabDialogsCocoa::CreateTabDialogsViewsMac(
+    content::WebContents* contents) {
+  return new TabDialogsViewsMac(contents);
+}