Hopefully make DownloadTest.UnknownSize not-flaky.

chrome/browser/download/download_uitest.cc

 // Copyright (c) 2006-2008 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 <shlwapi.h>
 #include <sstream>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 210 matching lines @@
   ASSERT_TRUE(tab_proxy.get());
   EXPECT_TRUE(WaitForDownloadShelfVisible(tab_proxy.get()));
 }
 
 // UnknownSize and KnownSize are tests which depend on
 // URLRequestSlowDownloadJob to serve content in a certain way. Data will be
 // sent in two chunks where the first chunk is 35K and the second chunk is 10K.
 // The test will first attempt to download a file; but the server will "pause"
 // in the middle until the server receives a second request for
 // "download-finish.  At that time, the download will finish.
-// TODO(paul): Reenable, http://code.google.com/p/chromium/issues/detail?id=7191
-TEST_F(DownloadTest, DISABLED_UnknownSize) {
+TEST_F(DownloadTest, UnknownSize) {
   std::wstring url(URLRequestSlowDownloadJob::kUnknownSizeUrl);
   std::wstring filename = file_util::GetFilenameFromPath(url);
   RunSizeTest(url, L"32.0 KB - " + filename, L"100% - " + filename);
 }
 
 // http://b/1158253
 TEST_F(DownloadTest, DISABLED_KnownSize) {
   std::wstring url(URLRequestSlowDownloadJob::kKnownSizeUrl);
   std::wstring filename = file_util::GetFilenameFromPath(url);
   RunSizeTest(url, L"71% - " + filename, L"100% - " + filename);
 }