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 cc5b5e782bd0c2c8a8b6270ce89485bf5e6843e5..13db10aec375b13044d284d4e08c3c8fd1661b4e 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -169,6 +169,9 @@ 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,