[interpreter] Add CreateBlockContext bytecode

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 18e2bb16ed503a0d22eb4436fb9aeaa9a306e8d5..40984880f201e91ff9cb8653be0c10c7d121959a 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -135,6 +135,11 @@ class BytecodeArrayBuilder final : public ZoneObject {
   // constant pool index |entry|.
   BytecodeArrayBuilder& CreateClosure(size_t entry, int flags);
 
+  // Create a new local context for a ScopeInfo which will be inserted at
+  // constant pool index |entry| and with a closure which should be in the
+  // accumulator.
+  BytecodeArrayBuilder& CreateBlockContext(size_t entry);
+
   // Create a new context with size |slots|.
   BytecodeArrayBuilder& CreateFunctionContext(int slots);