[turbofan] Remove obsolete --turbo-try-catch flag.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 19235 matching lines @@
   access_check_fail_thrown = false;
   catch_callback_called = false;
   CompileRun("try { [1, 2, 3].sort(); } catch (e) { catcher(e) };");
   CHECK(!access_check_fail_thrown);
   CHECK(!catch_callback_called);
 }
 
 
 TEST(AccessCheckThrows) {
   i::FLAG_allow_natives_syntax = true;
-  i::FLAG_turbo_try_catch = true;
   v8::V8::Initialize();
   v8::V8::SetFailedAccessCheckCallbackFunction(&FailedAccessCheckThrows);
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
 
   // Create an ObjectTemplate for global objects and install access
   // check callbacks that will block access.
   v8::Handle<v8::ObjectTemplate> global_template =
       v8::ObjectTemplate::New(isolate);
   global_template->SetAccessCheckCallbacks(AccessAlwaysBlocked, NULL);
@@ skipping 2584 matching lines @@
   timeout_thread.Join();
 }
 
 
 TEST(EstimatedContextSize) {
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
   LocalContext env;
   CHECK(50000 < env->EstimatedSize());
 }