Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa_unittest.mm

 // 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 "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/media_galleries/media_galleries_dialog_controller_mock.h"
 #include "chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h"
 #include "components/storage_monitor/storage_info.h"
@@ skipping 65 matching lines @@
     if (!dialog_.get()) {
       dialog_.reset(static_cast<MediaGalleriesDialogCocoa*>(
           MediaGalleriesDialog::Create(&controller_)));
     }
     return dialog_.get();
   }
 
  private:
   NiceMock<MediaGalleriesDialogControllerMock> controller_;
 
-  scoped_ptr<MediaGalleriesDialogCocoa> dialog_;
+  std::unique_ptr<MediaGalleriesDialogCocoa> dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaGalleriesDialogTest);
 };
 
 // Tests that checkboxes are initialized according to the contents of
 // permissions().
 TEST_F(MediaGalleriesDialogTest, InitializeCheckboxes) {
   MediaGalleriesDialogController::Entries attached_permissions;
   attached_permissions.push_back(
       MediaGalleriesDialogController::Entry(MakePrefInfoForTesting(1), true));
@@ skipping 104 matching lines @@
   // Remove a gallery.
   attached_permissions.erase(attached_permissions.begin());
   GetOrCreateDialog()->UpdateGalleries();
   EXPECT_EQ(1U, [[GetOrCreateDialog()->checkbox_container_ subviews] count]);
 
   // The checkbox container should be shorter.
   CGFloat new_container_height =
       NSHeight([GetOrCreateDialog()->checkbox_container_ frame]);
   EXPECT_LT(new_container_height, old_container_height);
 }