[turbofan] Enable deoptimization for non-asm.js TurboFan code.

test/cctest/compiler/test-run-deopt.cc

 // Copyright 2014 the V8 project 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 "src/v8.h"
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/function-tester.h"
 
 using namespace v8;
@@ skipping 11 matching lines @@
 
 static void InstallIsOptimizedHelper(v8::Isolate* isolate) {
   Local<v8::Context> context = isolate->GetCurrentContext();
   Local<v8::FunctionTemplate> t = FunctionTemplate::New(isolate, IsOptimized);
   context->Global()->Set(v8_str("IsOptimized"), t->GetFunction());
 }
 
 
 TEST(TurboSimpleDeopt) {
   FLAG_allow_natives_syntax = true;
-  FLAG_turbo_deoptimization = true;
 
   FunctionTester T(
       "(function f(a) {"
       "var b = 1;"
       "if (!IsOptimized()) return 0;"
       "%DeoptimizeFunction(f);"
       "if (IsOptimized()) return 0;"
       "return a + b; })");
 
   InstallIsOptimizedHelper(CcTest::isolate());
   T.CheckCall(T.Val(2), T.Val(1));
 }
 
 
 TEST(TurboSimpleDeoptInExpr) {
   FLAG_allow_natives_syntax = true;
-  FLAG_turbo_deoptimization = true;
 
   FunctionTester T(
       "(function f(a) {"
       "var b = 1;"
       "var c = 2;"
       "if (!IsOptimized()) return 0;"
       "var d = b + (%DeoptimizeFunction(f), c);"
       "if (IsOptimized()) return 0;"
       "return d + a; })");
 
   InstallIsOptimizedHelper(CcTest::isolate());
   T.CheckCall(T.Val(6), T.Val(3));
 }
 
 #endif
 
 TEST(TurboTrivialDeopt) {
   FLAG_allow_natives_syntax = true;
-  FLAG_turbo_deoptimization = true;
 
   FunctionTester T(
       "(function foo() {"
       "%DeoptimizeFunction(foo);"
       "return 1; })");
 
   T.CheckCall(T.Val(1));
 }