Introduce LanguageMode, drop StrictMode.

src/compiler/ast-graph-builder.h

 // 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.
 
 #ifndef V8_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/v8.h"
 
 #include "src/ast.h"
@@ skipping 136 matching lines @@
   SetOncePointer<Node> function_closure_;
   SetOncePointer<Node> function_context_;
 
   // The node representing the OSR entry into the loop, if any.
   SetOncePointer<Node> osr_loop_entry_;
 
   // Result of loop assignment analysis performed before graph creation.
   LoopAssignmentAnalysis* loop_assignment_analysis_;
 
   CompilationInfo* info() const { return info_; }
-  inline StrictMode strict_mode() const;
+  inline LanguageMode language_mode() const;
   JSGraph* jsgraph() { return jsgraph_; }
   JSOperatorBuilder* javascript() { return jsgraph_->javascript(); }
   ZoneVector<Handle<Object>>* globals() { return &globals_; }
 
   // Current scope during visitation.
   inline Scope* current_scope() const;
 
   // Named and keyed loads require a VectorSlotPair for successful lowering.
   VectorSlotPair CreateVectorSlotPair(FeedbackVectorICSlot slot) const;
 
@@ skipping 290 matching lines @@
 
 Scope* AstGraphBuilder::current_scope() const {
   return execution_context_->scope();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_