Misc. small cleanups to minimize TemplateURL refactoring diffs:

chrome/browser/search_engines/template_url_fetcher.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_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_
 #pragma once
 
 #include "base/memory/scoped_vector.h"
 #include "base/string16.h"
@@ skipping 20 matching lines @@
   };
 
   // Creates a TemplateURLFetcher with the specified Profile.
   explicit TemplateURLFetcher(Profile* profile);
   ~TemplateURLFetcher();
 
   // If TemplateURLFetcher is not already downloading the OSDD for osdd_url,
   // it is downloaded. If successful and the result can be parsed, a TemplateURL
   // is added to the TemplateURLService. Takes ownership of |callbacks|.
   //
+  // If |provider_type| is AUTODETECTED_PROVIDER, |keyword| must be non-empty,
+  // and if there's already a non-replaceable TemplateURL in the model for
+  // |keyword|, or we're already downloading an OSDD for this keyword, no
+  // download is started.  If |provider_type| is EXPLICIT_PROVIDER, |keyword| is
+  // ignored.
+  //
   // |web_contents| specifies which WebContents displays the page the OSDD is
   // downloaded for. |web_contents| must not be NULL, except during tests.
   void ScheduleDownload(const string16& keyword,
                         const GURL& osdd_url,
                         const GURL& favicon_url,
                         content::WebContents* web_contents,
                         TemplateURLFetcherCallbacks* callbacks,
                         ProviderType provider_type);
 
   // The current number of outstanding requests.
@@ skipping 14 matching lines @@
 
   Profile* profile_;
 
   // In progress requests.
   Requests requests_;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURLFetcher);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_FETCHER_H_