Typecheck chrome://downloads using CompilerPass.java

chrome/browser/ui/webui/downloads_dom_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/downloads_dom_handler.h"
 
 #include <algorithm>
 #include <functional>
 
 #include "base/basictypes.h"
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 // Returns a JSON dictionary containing some of the attributes of |download|.
 // The JSON dictionary will also have a field "id" set to |id|, and a field
 // "otr" set to |incognito|.
 base::DictionaryValue* CreateDownloadItemValue(
     content::DownloadItem* download_item,
     bool incognito) {
   // TODO(asanka): Move towards using download_model here for getting status and
   // progress. The difference currently only matters to Drive downloads and
   // those don't show up on the downloads page, but should.
   DownloadItemModel download_model(download_item);
+
+  // The items which are to be written into file_value are also described in
+  // chrome/browser/resources/downloads/downloads.js in @typedef for
+  // BackendDownloadObject. Please update it whenever you add or remove
+  // any keys in file_value.
   base::DictionaryValue* file_value = new base::DictionaryValue();
 
   file_value->SetInteger(
       "started", static_cast<int>(download_item->GetStartTime().ToTimeT()));
   file_value->SetString(
       "since_string", ui::TimeFormat::RelativeDate(
           download_item->GetStartTime(), NULL));
   file_value->SetString(
       "date_string", base::TimeFormatShortDate(download_item->GetStartTime()));
   file_value->SetInteger("id", download_item->GetId());
@@ skipping 444 matching lines @@
 }
 
 void DownloadsDOMHandler::CallDownloadsList(const base::ListValue& downloads) {
   web_ui()->CallJavascriptFunction("downloadsList", downloads);
 }
 
 void DownloadsDOMHandler::CallDownloadUpdated(
     const base::ListValue& download_item) {
   web_ui()->CallJavascriptFunction("downloadUpdated", download_item);
 }