Mojom compiler frontend: Change the type of the |offset| field to uint32.

mojom/mojom_tool/serialization/serialization.go

 // 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.
 
 package serialization
 
 import (
         "bytes"
         "compress/gzip"
         "encoding/base64"
@@ skipping 304 matching lines @@
         }
 }
 
 func translateStructField(f *mojom.StructField) (field mojom_types.StructField) {
         field.DeclData = translateDeclarationData(&f.DeclarationData)
         field.Type = translateTypeRef(f.FieldType)
         if f.DefaultValue != nil {
                 field.DefaultValue = translateDefaultFieldValue(f.DefaultValue)
         }
         if emitComputedPackingData {
-                // TODO(rudominer) Check the allowed size of offsets. The type used in
-                // mojom_types.mojom might need to be changed.
-                field.Offset = int32(f.Offset())
+                field.Offset = f.Offset()
                 field.Bit = int8(f.Bit())
                 field.MinVersion = f.MinVersion()
         }
         return
 }
 
 func translateDefaultFieldValue(v mojom.ValueRef) mojom_types.DefaultFieldValue {
         switch v := v.(type) {
         case mojom.LiteralValue:
                 if v.IsDefault() {
@@ skipping 409 matching lines @@
 
 // stringPointer is a convenience function for creating a pointer to a string whose value
 // is the specified string. It may be used in situations where the compiler will
 // not allow you to take the address of a string value directly, such as the
 // return value of a function. It is necessary to create pointers to strings because
 // that is how the Mojom type |string?| (i.e. nullable string) is represented in
 // in the Mojom Go bindings.
 func stringPointer(s string) *string {
         return &s
 }