Mojom runtime type info: Use compression and base64 encoding.

mojo/public/interfaces/bindings/mojom_files.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [DartPackage="mojo", JavaPackage="org.chromium.mojo.bindings.types"]
 module mojo.bindings.types;
 
 import "mojom_types.mojom";
 
 /*
@@ skipping 52 matching lines @@
   array<string>? imports;
 
   // resolved_types and resolved_values in MojomFileGraph contain
   // respectively the types and constants declared in the union of all modules
   // in the graph. This KeysByType selects the keys of the types and constants
   // defined in this module
   KeysByType declared_mojom_objects;
 
   // The bytes encoding a |RuntimeTypeInfo| struct for this Mojom file,
   // using Mojo message serialization. Some implementations may not include
-  // this.
-  array<uint8>? serialized_runtime_type_info;
+  // this. This string contains the base64 encoding of the gzip-compressed
+  // bytes.
+  string? serialized_runtime_type_info;
 };
 
 // Represents a directed acyclic graph of MojomFiles.
 struct MojomFileGraph {
   // All the files in this graph. The keys are |file_name|s.
   map<string, MojomFile> files;
 
   // All the resolved user-defined types known to this structure. The keys are
   // the |type_key|s.
   map<string, UserDefinedType> resolved_types;
@@ skipping 11 matching lines @@
   array<string>? interfaces;
   array<string>? structs;
   array<string>? unions;
   array<string>? top_level_enums;
   array<string>? embedded_enums;
 
   // All the constant_keys known to the owning MojomFileGraph.
   array<string>? top_level_constants;
   array<string>? embedded_constants;
 };