Revert "Update mojo sdk to rev 8d45c89c30b230843c5bd6dd0693a555750946c0"

third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl

Index: third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl
diff --git a/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl b/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl
index f65298fe72cbef2f6cfba8e338fc23ad577f669e..f5b62a9eeb285e21a05f30faa3060d0cd72071e7 100644
--- a/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl
+++ b/third_party/mojo/src/mojo/public/tools/bindings/generators/dart_templates/struct_definition.tmpl
@@ -50,13 +50,12 @@ if (decoder{{level+1}} == null) {
   List<{{kind.key_kind|dart_type}}> keys{{level}};
   List<{{kind.value_kind|dart_type}}> values{{level}};
   {
-    {{decode('keys'~level, kind.key_kind|array, 'bindings.DataHeader.kHeaderSize', 0, level+1)|indent(4)}}
+    {{decode('keys'~level, kind.key_kind|array, 'DataHeader.HEADER_SIZE', 0, level+1)|indent(4)}}
   }
   {
     {{decode('values'~level, kind.value_kind|array('keys'~level~'.length'), 'bindings.DataHeader.kHeaderSize + bindings.kPointerSize', 0, level+1)|indent(4)}}
   }
-  {{variable}} = new Map<{{kind.key_kind|dart_type}}, {{kind.value_kind|dart_type}}>.fromIterables(
-      keys{{level}}, values{{level}});
+  {{variable}} = new Map<{{kind.key_kind|dart_type}}, {{kind.value_kind|dart_type}}>.fromIterables(keys, values);
 {%-     else %}
   var si{{level+1}} = decoder{{level+1}}.decodeDataHeaderForPointerArray({{kind|array_expected_length}});
   {{variable}} = new {{kind|dart_type}}(si{{level+1}}.numFields);
@@ -106,13 +105,11 @@ class {{struct|name}} extends bindings.Struct {
       return null;
     }
     {{struct|name}} result = new {{struct|name}}();
-
+{%- if not struct.bytes %}
+    decoder0.decodeDataHeader();
+{%- else %}
     var mainDataHeader = decoder0.decodeDataHeader();
-    if ((mainDataHeader.size < kStructSize) ||
-        (mainDataHeader.numFields < {{struct.packed.packed_fields|length}})) {
-      throw new bindings.MojoCodecError('Malformed header');
-    }
-
+{%- endif %}
 {%- for byte in struct.bytes %}
 {%-   for packed_field in byte.packed_fields %}
     if (mainDataHeader.numFields > {{packed_field.ordinal}}) {