Add a bunch of missing bug references to FLAKY tests

chrome/test/plugin/plugin_test.cpp

 // Copyright (c) 2010 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.
 
 // Tests for the top plugins to catch regressions in our plugin host code, as
 // well as in the out of process code.  Currently this tests:
 //  Flash
 //  Real
 //  QuickTime
 //  Windows Media Player
@@ skipping 175 matching lines @@
 #if defined(OS_WIN)
 // Windows only test
 TEST_F(PluginTest, FlashSecurity) {
   TestPlugin("flash.html", action_max_timeout_ms(), false);
 }
 #endif  // defined(OS_WIN)
 
 #if defined(OS_WIN)
 // TODO(port) Port the following tests to platforms that have the required
 // plugins.
+// Flaky: http://crbug.com/55915
 TEST_F(PluginTest, FLAKY_Quicktime) {
   TestPlugin("quicktime.html", action_max_timeout_ms(), false);
 }
 
 // Disabled on Release bots - http://crbug.com/44662
 #if defined(NDEBUG)
 #define MediaPlayerNew DISABLED_MediaPlayerNew
 #endif
 TEST_F(PluginTest, MediaPlayerNew) {
   TestPlugin("wmp_new.html", action_max_timeout_ms(), false);
@@ skipping 137 matching lines @@
 TEST_F(PluginInstallerDownloadTest, PluginInstallerDownloadPathTest) {
   MessageLoop loop(MessageLoop::TYPE_IO);
   Start();
   loop.Run();
 
   EXPECT_TRUE(success());
   EXPECT_TRUE(initial_download_path().BaseName().value() ==
               final_download_path().BaseName().value());
 }
 #endif  // defined(OS_WIN)