Fix up unused includes from chrome/browser/extensions to the rest of chrome/browser.

chrome/browser/extensions/dom_actions.cc

 // Copyright (c) 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.
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/dom_actions.h"
+#include "chrome/browser/history/url_database.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace extensions {
 
 const char* DOMAction::kTableName = "activitylog_urls";
 const char* DOMAction::kTableContentFields[] =
     {"url_action_type", "url", "url_title", "api_call", "args", "extra"};
 
@@ skipping 104 matching lines @@
     return INSERTED;
   } else if (str == "XHR") {
     return XHR;
   } else {
     NOTREACHED();
     return MODIFIED;  // this should never happen!
   }
 }
 
 }  // namespace extensions
-