C bindings string descriptor: Use field initializers.

mojo/public/c/bindings/lib/type_descriptor.c

 // Copyright 2016 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.
 
 #include "mojo/public/c/bindings/lib/type_descriptor.h"
 
 #include <assert.h>
 #include <stddef.h>
 
 #include "mojo/public/c/bindings/array.h"
 #include "mojo/public/c/bindings/interface.h"
 #include "mojo/public/c/bindings/lib/util.h"
 #include "mojo/public/c/bindings/map.h"
 #include "mojo/public/c/bindings/struct.h"
 #include "mojo/public/c/bindings/union.h"
 
 const struct MojomTypeDescriptorArray g_mojom_string_type_description = {
-    MOJOM_TYPE_DESCRIPTOR_TYPE_POD,  // elem_type
-    NULL,                            // elem_descriptor
-    0,                               // num_elements
-    8,                               // elem_num_bits
-    false,                           // nullable
+  .elem_type = MOJOM_TYPE_DESCRIPTOR_TYPE_POD,
+  .elem_descriptor = NULL,
+  .num_elements = 0,
+  .elem_num_bits = 8,
+  .nullable = false,
 };
 
 // The encoding of a MojoHandle is an index into an array of Handles. A
 // null/invalid handle is encoded as index (which is unsigned) "-1", which
 // equates to the highest possible index.
 static const MojoHandle kEncodedHandleInvalid = (MojoHandle)-1;
 
 bool MojomType_IsPointer(enum MojomTypeDescriptorType type) {
   return type == MOJOM_TYPE_DESCRIPTOR_TYPE_STRUCT_PTR ||
          type == MOJOM_TYPE_DESCRIPTOR_TYPE_MAP_PTR ||
@@ skipping 418 matching lines @@
                           in_union_data,
                           out_union_data);
     case MOJOM_TYPE_DESCRIPTOR_TYPE_HANDLE:
     case MOJOM_TYPE_DESCRIPTOR_TYPE_INTERFACE:
     case MOJOM_TYPE_DESCRIPTOR_TYPE_POD:
       break;
   }
 
   return true;
 }