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 60 matching lines @@
 
 }  // namespace
 
 const char GDataWapiUrlGenerator::kBaseUrlForProduction[] =
     "https://docs.google.com/";
 
 // static
 GURL GDataWapiUrlGenerator::AddStandardUrlParams(const GURL& url) {
   GURL result = net::AppendOrReplaceQueryParameter(url, "v", "3");
   result = net::AppendOrReplaceQueryParameter(result, "alt", "json");
+  result = net::AppendOrReplaceQueryParameter(result, "showroot", "true");
   return result;
 }
 
 // static
 GURL GDataWapiUrlGenerator::AddInitiateUploadUrlParams(const GURL& url) {
   GURL result = net::AppendOrReplaceQueryParameter(url, "convert", "false");
   return AddStandardUrlParams(result);
 }
 
 // static
@@ skipping 126 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