[kernel] Stream everything. Replace .kernel_function with .kernel_offset

pkg/kernel/binary.md

Index: pkg/kernel/binary.md
diff --git a/pkg/kernel/binary.md b/pkg/kernel/binary.md
index b07e9a289b6eae876499d22396a0d469c75300c9..09fc3e6277dcf087c0907b65e124c57dba4cead4 100644
--- a/pkg/kernel/binary.md
+++ b/pkg/kernel/binary.md
@@ -329,6 +329,7 @@ type FunctionNode {
   Byte asyncMarker; // Index into AsyncMarker above.
   Byte dartAsyncMarker; // Index into AsyncMarker above.
   List<TypeParameter> typeParameters;
+  UInt parameterCount; // positionalParameters.length + namedParameters.length.
   UInt requiredParameterCount;
   List<VariableDeclaration> positionalParameters;
   List<VariableDeclaration> namedParameters;