[turbofan] Remove the JSContextRelaxation reducer.

src/compiler/js-inlining.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/compiler/js-inlining.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/ast-numbering.h"
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
@@ skipping 226 matching lines @@
   }
 }
 
 
 Node* JSInliner::CreateArtificialFrameState(Node* node, Node* outer_frame_state,
                                             int parameter_count,
                                             FrameStateType frame_state_type,
                                             Handle<SharedFunctionInfo> shared) {
   const FrameStateFunctionInfo* state_info =
       jsgraph_->common()->CreateFrameStateFunctionInfo(
-          frame_state_type, parameter_count + 1, 0, shared,
-          CALL_MAINTAINS_NATIVE_CONTEXT);
+          frame_state_type, parameter_count + 1, 0, shared);
 
   const Operator* op = jsgraph_->common()->FrameState(
       BailoutId(-1), OutputFrameStateCombine::Ignore(), state_info);
   const Operator* op0 = jsgraph_->common()->StateValues(0);
   Node* node0 = jsgraph_->graph()->NewNode(op0);
   NodeVector params(local_zone_);
   for (int parameter = 0; parameter < parameter_count + 1; ++parameter) {
     params.push_back(node->InputAt(1 + parameter));
   }
   const Operator* op_param =
@@ skipping 253 matching lines @@
         node, frame_state, call.formal_arguments(),
         FrameStateType::kArgumentsAdaptor, info.shared_info());
   }
 
   return InlineCall(node, new_target, context, frame_state, start, end);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8