[ic] Encode [Keyed]StoreIC's language mode in slot kind instead of code object's flags.

src/full-codegen/full-codegen.h

 // Copyright 2012 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.
 
 #ifndef V8_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast/ast.h"
@@ skipping 552 matching lines @@
   class ExpressionContext;
   const ExpressionContext* context() { return context_; }
   void set_new_context(const ExpressionContext* context) { context_ = context; }
 
   Isolate* isolate() const { return isolate_; }
   Zone* zone() const { return zone_; }
   Handle<Script> script();
   LanguageMode language_mode();
   bool has_simple_parameters();
   FunctionLiteral* literal() const;
+  const FeedbackVectorSpec* feedback_vector_spec() const;
   Scope* scope() { return scope_; }
 
   static Register context_register();
 
   // Get fields from the stack frame. Offsets are the frame pointer relative
   // offsets defined in, e.g., StandardFrameConstants.
   void LoadFromFrameField(int frame_offset, Register value);
   // Set fields in the stack frame. Offsets are the frame pointer relative
   // offsets defined in, e.g., StandardFrameConstants.
   void StoreToFrameField(int frame_offset, Register value);
@@ skipping 312 matching lines @@
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_