Change queryId of launcherSearchProvider API to integer.

chrome/common/extensions/api/launcher_search_provider.idl

 // Copyright 2015 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.
 
 // An API to listen queries of the Chrome Launcher and provide search results
 // to it.
 [platforms=("chromeos"),
  implemented_in="chrome/browser/chromeos/extensions/launcher_search_provider.h",
  nodoc]
 namespace launcherSearchProvider {
   dictionary SearchResult {
     DOMString itemId;
     DOMString title;
     // If iconUrl is not provided, app/extension icon is used automatically.
     DOMString? iconUrl;
     // Relevance ranges from 0 to 4. 0 is the lowest relevance, 4 is highest.
     long relevance;
   };
 
   interface Functions {
     // Sets search result of this extension for the query. Setting a new search
     // results overwrites any previous results of this extension. If queryId is
     // invalid, the results are discarded. Since the space is limited, it is not
     // guranteed that all provided results are shown to a user. The search
     // results will be sorted by relevance, with ties broken by the order of the
     // results in this list (highest priority first).
-    static void setSearchResults(DOMString queryId, SearchResult[] results);
+    static void setSearchResults(long queryId, SearchResult[] results);
   };
 
   interface Events {
     // Called when a user typed a query. maxResult is the maximum number of
     // results the extension should provide.
-    static void onQueryStarted(DOMString queryId,
+    static void onQueryStarted(long queryId,
                                DOMString query,
                                long maxResult);
 
     // Called when query of |queryId| is ended. After this call,
     // setSearchResults no longer accept the results for queryId.
-    static void onQueryEnded(DOMString queryId);
+    static void onQueryEnded(long queryId);
 
     // Called when a user clicks a search result which is provided by
     // setSearchResults.
     static void onOpenResult(DOMString itemId);
   };
 };