Use a different map to distinguish eval contexts

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 280bb0460acaad6c1d84d3e70595c346883dd28c..69809fb02420e779e1d3e5959ccfd65316be1a3f 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -177,6 +177,9 @@ class V8_EXPORT_PRIVATE BytecodeArrayBuilder final
   // Create a new context with size |slots|.
   BytecodeArrayBuilder& CreateFunctionContext(int slots);
 
+  // Create a new eval context with size |slots|.
+  BytecodeArrayBuilder& CreateEvalContext(int slots);
+
   // Creates a new context with the given |scope_info| for a with-statement
   // with the |object| in a register and the closure in the accumulator.
   BytecodeArrayBuilder& CreateWithContext(Register object,