drive: Add showroot=true to WAPI feed URLs and ignore "no parent" entries.

chrome/browser/google_apis/gdata_wapi_url_generator.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/google_apis/gdata_wapi_url_generator.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/escape.h"
@@ skipping 76 matching lines @@
   return AddStandardUrlParams(result);
 }
 
 // static
 GURL GDataWapiUrlGenerator::AddFeedUrlParams(
     const GURL& url,
     int num_items_to_fetch,
     int changestamp,
     const std::string& search_string) {
   GURL result = AddStandardUrlParams(url);
+  result = net::AppendOrReplaceQueryParameter(result, "showroot", "true");

[kinaba, 2013/03/11 09:22:38]

I think this should be moved to AddStandardUrlParams.
(as far as I tried, it worked.)

Other operations like CreateDirectory, CopyHostedDocument, GetResourceEntry,
or ResumeUploadOperations returns ResourceEntry with parent field,
whose behavior changes with "showroot=true".

[Haruki Sato, 2013/03/11 14:15:35]

Done.
Thanks.

   result = net::AppendOrReplaceQueryParameter(result, "showfolders", "true");
   result = net::AppendOrReplaceQueryParameter(
       result,
       "max-results",
       base::StringPrintf("%d", num_items_to_fetch));
   result = net::AppendOrReplaceQueryParameter(
       result, "include-installed-apps", "true");
 
   if (changestamp) {
     result = net::AppendQueryParameter(result,
@@ skipping 110 matching lines @@
     bool include_installed_apps) const {
   GURL result = AddStandardUrlParams(base_url_.Resolve(kAccountMetadataURL));
   if (include_installed_apps) {
     result = net::AppendOrReplaceQueryParameter(
         result, "include-installed-apps", "true");
   }
   return result;
 }
 
 }  // namespace google_apis