[interpreter] Make branch analysis result const again.

src/compiler/bytecode-graph-builder.h

 // Copyright 2015 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_BYTECODE_GRAPH_BUILDER_H_
 #define V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_
 
 #include "src/compiler.h"
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/js-graph.h"
@@ skipping 196 matching lines @@
 
   void set_bytecode_iterator(
       const interpreter::BytecodeArrayIterator* bytecode_iterator) {
     bytecode_iterator_ = bytecode_iterator;
   }
 
   const BytecodeBranchAnalysis* branch_analysis() const {
     return branch_analysis_;
   }
 
-  void set_branch_analysis(BytecodeBranchAnalysis* branch_analysis) {
+  void set_branch_analysis(const BytecodeBranchAnalysis* branch_analysis) {
     branch_analysis_ = branch_analysis;
   }
 
 #define DECLARE_VISIT_BYTECODE(name, ...) void Visit##name();
   BYTECODE_LIST(DECLARE_VISIT_BYTECODE)
 #undef DECLARE_VISIT_BYTECODE
 
   Zone* local_zone_;
   CompilationInfo* info_;
   JSGraph* jsgraph_;
   Handle<BytecodeArray> bytecode_array_;
   Handle<HandlerTable> exception_handler_table_;
   const FrameStateFunctionInfo* frame_state_function_info_;
   const interpreter::BytecodeArrayIterator* bytecode_iterator_;
-  BytecodeBranchAnalysis* branch_analysis_;  // TODO(mstarzinger): Make const.
+  const BytecodeBranchAnalysis* branch_analysis_;
   Environment* environment_;
 
   // Merge environments are snapshots of the environment at points where the
   // control flow merges. This models a forward data flow propagation of all
   // values from all predecessors of the merge in question.
   ZoneMap<int, Environment*> merge_environments_;
 
   // Exception handlers currently entered by the iteration.
   ZoneStack<ExceptionHandler> exception_handlers_;
   int current_exception_handler_;
@@ skipping 14 matching lines @@
   ZoneVector<Node*> exit_controls_;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeGraphBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_BYTECODE_GRAPH_BUILDER_H_