Reland DownloadManager::GetAllDownloads actually does now

chrome/browser/browsing_data/browsing_data_remover_browsertest.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 "base/file_path.h"
 #include "base/path_service.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 68 matching lines @@
           download_manager, 1,
           content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_ACCEPT));
 
   GURL download_url = ui_test_utils::GetTestUrl(
       FilePath().AppendASCII("downloads"),
       FilePath().AppendASCII("a_zip_file.zip"));
   ui_test_utils::NavigateToURL(browser(), download_url);
   observer->WaitForFinished();
 
   std::vector<content::DownloadItem*> downloads;
-  download_manager->GetAllDownloads(FilePath(), &downloads);
+  download_manager->GetAllDownloads(&downloads);
   EXPECT_EQ(1u, downloads.size());
 
   RemoveAndWait(BrowsingDataRemover::REMOVE_DOWNLOADS);
 
   downloads.clear();
-  download_manager->GetAllDownloads(FilePath(), &downloads);
+  download_manager->GetAllDownloads(&downloads);
   EXPECT_TRUE(downloads.empty());
 }
 
 // Verify can modify database after deleting it.
 IN_PROC_BROWSER_TEST_F(BrowsingDataRemoverBrowserTest, Database) {
   GURL url(URLRequestMockHTTPJob::GetMockUrl(
       FilePath().AppendASCII("simple_database.html")));
   ui_test_utils::NavigateToURL(browser(), url);
 
   RunScriptAndCheckResult(L"createTable()", "done");
   RunScriptAndCheckResult(L"insertRecord('text')", "done");
   RunScriptAndCheckResult(L"getRecords()", "text");
 
   RemoveAndWait(BrowsingDataRemover::REMOVE_SITE_DATA);
 
   ui_test_utils::NavigateToURL(browser(), url);
   RunScriptAndCheckResult(L"createTable()", "done");
   RunScriptAndCheckResult(L"insertRecord('text2')", "done");
   RunScriptAndCheckResult(L"getRecords()", "text2");
 }