Removed unneeded includes of base/time.h.

chrome/browser/history/history.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_HISTORY_HISTORY_H__
 #define CHROME_BROWSER_HISTORY_HISTORY_H__
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gfx/rect.h"
 #include "base/lock.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/task.h"
-#include "base/time.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/page_transition_types.h"
 #include "chrome/common/ref_counted_util.h"
 
 class BookmarkService;
 class ChromeThread;
 struct DownloadCreateInfo;
 class FilePath;
 class GURL;
 class HistoryURLProvider;
 struct HistoryURLProviderParams;
 class InMemoryURLDatabase;
 class MainPagesRequest;
 class PageUsageData;
 class PageUsageRequest;
 class Profile;
 class SkBitmap;
 struct ThumbnailScore;
 
+namespace base {
+  class Time;
+}
+
 namespace history {
 
 class InMemoryHistoryBackend;
 class HistoryBackend;
 class HistoryDatabase;
 class HistoryQueryTest;
 class URLDatabase;
 
 }  // namespace history
 
@@ skipping 705 matching lines @@
   Profile* profile_;
 
   // Has the backend finished loading? The backend is loaded once Init has
   // completed.
   bool backend_loaded_;
 
   DISALLOW_EVIL_CONSTRUCTORS(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_H__