Mojom runtime type info: Use compression and base64 encoding.

mojo/public/tools/bindings/generators/go_templates/source.tmpl

 // 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.
 
 // This file is autogenerated by:
 //     mojo/public/tools/bindings/mojom_bindings_generator.py
 // For:
 //     {{module.path}}
 //
 
@@ skipping 12 matching lines @@
 
 {%- if should_gen_mojom_types -%}
 // This global variable contains a mojom_types.RuntimeTypeInfo struct
 // describing the types defined in this file and all of its imports as
 // well as the top-level interfaces defined in this file.
 var runtimeTypeInfo__ = {{typepkg}}RuntimeTypeInfo{}
 
 func init() {
   // serializedRuntimeTypeInfo contains the bytes of the Mojo serialization of
   // a mojom_types.RuntimeTypeInfo struct describing the Mojom types in this file.
-  serializedRuntimeTypeInfo := []uint8{{serialized_runtime_type_info_literal}}
+  // The string contains the base64 encoding of the gzip-compressed bytes.
+  serializedRuntimeTypeInfo := "{{module.serialized_runtime_type_info}}"
 
   // Deserialize RuntimeTypeInfo
-  decoder := bindings.NewDecoder(serializedRuntimeTypeInfo, nil)
+  compressedBytes, err := base64.StdEncoding.DecodeString(serializedRuntimeTypeInfo)
+  if err != nil {
+    {# TODO(rudominer) Move this out of init() and do it lazily. Then
+    we should panic here. #}
+    return
+  }
+
+  reader, err2 := gzip.NewReader(bytes.NewBuffer(compressedBytes))
+  if err2 != nil {
+    panic(fmt.Sprintf("Error while decompressing runtimeTypeInfo: %s", err.Error()))
+  }
+  uncompressedBytes, err3 := ioutil.ReadAll(reader)
+  if err3 != nil {
+    {# TODO(rudominer) Move this out of init() and do it lazily. Then
+    we should panic here. #}
+    return
+  }
+  if err = reader.Close(); err != nil {
+    {# TODO(rudominer) Move this out of init() and do it lazily. Then
+    we should panic here. #}
+    return
+  }
+  decoder := bindings.NewDecoder(uncompressedBytes, nil)
   runtimeTypeInfo__.Decode(decoder)
 
   {% for mi in mojom_imports.values() %}
   {%- if mi ~ '.' != typepkg and mi ~ '.' != descpkg %}
   for s, udt := range {{mi}}.GetAllMojomTypeDefinitions() {
     runtimeTypeInfo__.TypeMap[s] = udt
   }
 
 
   {% endif -%}
@@ skipping 16 matching lines @@
 
 {#- Struct definitions #}
 {% for struct in structs %}
 {{struct_macros.define(struct, typepkg, package)}}
 {%- endfor %}
 
 {#- Union definitions #}
 {% for union in unions %}
 {{union_macros.define(union, typepkg, package)}}
 {%- endfor %}