Update uses of TimeDelta in mac bookmark test code.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_hover_state_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>
 
 #include "base/message_loop.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_hover_state.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
@@ skipping 30 matching lines @@
 
   // Test transition from closed to opening.
   ASSERT_EQ(kHoverStateClosed, [bbfhs hoverState]);
   [bbfhs scheduleOpenBookmarkFolderOnHoverButton:button];
   ASSERT_EQ(kHoverStateOpening, [bbfhs hoverState]);
 
   // Test transition from opening to opened.
   message_loop.PostDelayedTask(
       FROM_HERE,
       MessageLoop::QuitClosure(),
-      bookmarks::kDragHoverOpenDelay * 1000.0 * 1.5);
+      base::TimeDelta::FromMilliseconds(
+          bookmarks::kDragHoverOpenDelay * 1000.0 * 1.5));
   message_loop.Run();
   ASSERT_EQ(kHoverStateOpen, [bbfhs hoverState]);
   ASSERT_EQ(button, [bbfhs hoverButton]);
 
   // Test transition from opening to opened.
   [bbfhs scheduleCloseBookmarkFolderOnHoverButton];
   ASSERT_EQ(kHoverStateClosing, [bbfhs hoverState]);
 
   // Test transition from closing to open (aka cancel close).
   [bbfhs cancelPendingCloseBookmarkFolderOnHoverButton];
   ASSERT_EQ(kHoverStateOpen, [bbfhs hoverState]);
   ASSERT_EQ(button, [bbfhs hoverButton]);
 
   // Test transition from closing to closed.
   [bbfhs scheduleCloseBookmarkFolderOnHoverButton];
   ASSERT_EQ(kHoverStateClosing, [bbfhs hoverState]);
   message_loop.PostDelayedTask(
       FROM_HERE,
       MessageLoop::QuitClosure(),
-      bookmarks::kDragHoverCloseDelay * 1000.0 * 1.5);
+      base::TimeDelta::FromMilliseconds(
+          bookmarks::kDragHoverCloseDelay * 1000.0 * 1.5));
   message_loop.Run();
   ASSERT_EQ(kHoverStateClosed, [bbfhs hoverState]);
   ASSERT_EQ(nil, [bbfhs hoverButton]);
 }
 
 }  // namespace