Control ES2015 'Tail call elimination' language feature via finch flag.

base/test/test_suite.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/test/test_suite.h"
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/stack_trace.h"
-#include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/i18n/icu_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/process/launch.h"
 #include "base/process/memory.h"
 #include "base/test/gtest_xml_unittest_result_printer.h"
@@ skipping 192 matching lines @@
       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kTestChildProcess);
 
   // Check to see if we are being run as a client process.
   if (!client_func.empty())
     return multi_process_function_list::InvokeChildProcessTest(client_func);
 #if defined(OS_IOS)
   test_listener_ios::RegisterTestEndListener();
 #endif
 
-  // Set up a FeatureList instance, so that code using that API will not hit a
-  // an error that it's not set. Cleared by ClearInstanceForTesting() below.
-  base::FeatureList::SetInstance(make_scoped_ptr(new base::FeatureList));

[Igor Sheludko, 2016/03/29 21:18:20]

At this moment gin::IsolateHolder (and therefore FeatureList) is already
initialized and this call to SetInstance hits assertion failure.

-
   int result = RUN_ALL_TESTS();
 
-  // Clear the FeatureList that was registered above.
-  FeatureList::ClearInstanceForTesting();
-
 #if defined(OS_MACOSX)
   // This MUST happen before Shutdown() since Shutdown() tears down
   // objects (such as NotificationService::current()) that Cocoa
   // objects use to remove themselves as observers.
   scoped_pool.Recycle();
 #endif
 
   Shutdown();
 
   return result;
@@ skipping 112 matching lines @@
 
   TestTimeouts::Initialize();
 
   trace_to_file_.BeginTracingFromCommandLineOptions();
 }
 
 void TestSuite::Shutdown() {
 }
 
 }  // namespace base