[turbofan] Fix various issues with --turbo-inlining enabled.

test/cctest/test-sampler-api.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.
 //
 // Tests the sampling API in include/v8.h
 
 // TODO(mythria): Remove this define after this flag is turned on globally
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include <map>
@@ skipping 208 matching lines @@
 }
 
 
 // The captured sample should have three pc values.
 // They should fall in the range where the compiled code resides.
 // The expected stack is:
 // bottom of stack [{anon script}, outer, inner] top of stack
 //                              ^      ^       ^
 // sample.stack indices         2      1       0
 TEST(StackFramesConsistent) {
-  // Note: The arguments.callee stuff is there so that the
-  //       functions are not optimized away.
+  i::FLAG_allow_natives_syntax = true;
   const char* test_script =
       "function test_sampler_api_inner() {"
       "  CollectSample();"
-      "  return arguments.callee.toString();"
+      "  return 0;"
       "}"
       "function test_sampler_api_outer() {"
-      "  return test_sampler_api_inner() + arguments.callee.toString();"
+      "  return test_sampler_api_inner();"
       "}"
+      "%NeverOptimizeFunction(test_sampler_api_inner);"
+      "%NeverOptimizeFunction(test_sampler_api_outer);"
       "test_sampler_api_outer();";
 
   SamplingTestHelper helper(test_script);
   Sample& sample = helper.sample();
   CHECK_EQ(3, sample.size());
 
   const SamplingTestHelper::CodeEventEntry* entry;
   entry = helper.FindEventEntry(sample.begin()[0]);
   CHECK(entry);
   CHECK(std::string::npos != entry->name.find("test_sampler_api_inner"));
 
   entry = helper.FindEventEntry(sample.begin()[1]);
   CHECK(entry);
   CHECK(std::string::npos != entry->name.find("test_sampler_api_outer"));
 }