Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates

chrome/browser/download/download_query.h

 // Copyright (c) 2012 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_DOWNLOAD_DOWNLOAD_QUERY_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_QUERY_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
-#include "base/strings/string16.h"
 #include "content/public/browser/download_item.h"
 
 namespace base {
 class Value;
 }
 
 // Filter and sort a vector of DownloadItem*s.
 //
 // The following example copies from |all_items| to |results| those
 // DownloadItem*s whose start time is 0 and whose id is odd, sorts primarily by
@@ skipping 60 matching lines @@
     SORT_STATE,
     SORT_TOTAL_BYTES,
     SORT_URL,
   };
 
   enum SortDirection {
     ASCENDING,
     DESCENDING,
   };
 
-  static bool MatchesQuery(const std::vector<base::string16>& query_terms,
-                           const content::DownloadItem& item);
-
   DownloadQuery();
   ~DownloadQuery();
 
   // Adds a new filter of type |type| with value |value| and returns true if
   // |type| is valid and |value| is the correct Value-type and well-formed.
   // Returns false if |type| is invalid or |value| is the incorrect Value-type
   // or malformed.  Search() will filter out all DownloadItem*s that do not
   // match all filters.  Multiple instances of the same FilterType are allowed,
   // so you can pass two regexes to AddFilter(URL_REGEX,...) in order to
   // Search() for items whose url matches both regexes. You can also pass two
@@ skipping 49 matching lines @@
 
   FilterCallbackVector filters_;
   SorterVector sorters_;
   size_t limit_;
   size_t skip_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadQuery);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_QUERY_H_