Move code in components/safe_browsing_db and chrome/browser/s_b/ under the safe_browsing namespace.

chrome/browser/extensions/blacklist.h

 // Copyright 2013 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_EXTENSIONS_BLACKLIST_H_
 #define CHROME_BROWSER_EXTENSIONS_BLACKLIST_H_
 
 #include <list>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "chrome/browser/safe_browsing/database_manager.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/blacklist_state.h"
 
+using safe_browsing::SafeBrowsingDatabaseManager;

[Nathan Parker, 2015/11/10 23:53:34]

"using" should only be used in .cc files, since otherwise it pollutes the top
level namespace for anyone who includes it. So "using" is good in .cc and
certainly in _unittest.cc's, but not in .h.  Sorry if I wasn't clear on that
one. 

Oh, and a c++ quirk: "using" doesn't work on enums.  Not much we can do about
that.

[vakh (old account. dont use), 2015/11/11 18:59:52]

Done.

+
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class BlacklistStateFetcher;
 class Extension;
 class ExtensionPrefs;
 
@@ skipping 119 matching lines @@
   // GetBlacklistedIDs and deleted when the callback is called from
   // OnBlacklistStateReceived.
   StateRequestsList state_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(Blacklist);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_BLACKLIST_H_