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

chrome/browser/ui/cocoa/bookmarks/bookmark_tree_browser_cell_unittest.mm

 // Copyright (c) 2011 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_tree_browser_cell.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "testing/platform_test.h"
 
 using bookmarks::BookmarkNode;
 
 class BookmarkTreeBrowserCellTest : public PlatformTest {
  public:
   BookmarkTreeBrowserCellTest() {
     // Set up our mocks.
     GURL gurl;
     bookmarkNodeMock_.reset(new BookmarkNode(gurl));
     matrixMock_.reset([[NSMatrix alloc] init]);
     targetMock_.reset([[NSObject alloc] init]);
   }
 
-  scoped_ptr<BookmarkNode> bookmarkNodeMock_;
+  std::unique_ptr<BookmarkNode> bookmarkNodeMock_;
   base::scoped_nsobject<NSMatrix> matrixMock_;
   base::scoped_nsobject<NSObject> targetMock_;
 };
 
 TEST_F(BookmarkTreeBrowserCellTest, BasicAllocDealloc) {
   BookmarkTreeBrowserCell* cell = [[[BookmarkTreeBrowserCell alloc]
                                     initTextCell:@"TEST STRING"] autorelease];
   [cell setMatrix:matrixMock_.get()];
   [cell setTarget:targetMock_.get()];
   [cell setAction:@selector(mockAction:)];
   [cell setBookmarkNode:bookmarkNodeMock_.get()];
 
   NSMatrix* testMatrix = [cell matrix];
   EXPECT_EQ(testMatrix, matrixMock_.get());
   id testTarget = [cell target];
   EXPECT_EQ(testTarget, targetMock_.get());
   SEL testAction = [cell action];
   EXPECT_EQ(testAction, @selector(mockAction:));
   const BookmarkNode* testBookmarkNode = [cell bookmarkNode];
   EXPECT_EQ(testBookmarkNode, bookmarkNodeMock_.get());
 }