New go generator shakedown.

mojom/generators/go/templates/templates.go

 // 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.
 
 package templates
 
 import (
         "bytes"
+        "io/ioutil"
         "text/template"
 
         "mojom/generators/go/gofmt"
         "mojom/generators/go/translator"
 )
 
 // goFileTmpl is the template object for a go file.
 var goFileTmpl *template.Template
 
 // ExecuteTemplates accepts a translator.TmplFile and returns the formatted
 // source code for the go bindings.
 func ExecuteTemplates(tmplFile *translator.TmplFile) string {
         buffer := &bytes.Buffer{}
         if err := goFileTmpl.ExecuteTemplate(buffer, "FileTemplate", tmplFile); err != nil {
                 panic(err)
         }
 
-        src, err := gofmt.FormatGoFile(buffer.String())
+        unformatted := buffer.String()
+        src, err := gofmt.FormatGoFile(unformatted)
 
         if err != nil {
+                ioutil.WriteFile("/tmp/unformatted.go", buffer.Bytes(), 0666)
                 panic(err)
         }
         return src
 }
 
 func init() {
         // We parse the subtemplates only once.
         goFileTmpl = template.New("GoFileTemplate")
 
         template.Must(goFileTmpl.Parse(goFileTemplate))
@@ skipping 27 matching lines @@
 
 {{- range $enum := $fileTmpl.Enums}}
         {{ template "Enum" $enum }}
 {{- end}}
 
 {{- range $interface := $fileTmpl.Interfaces}}
         {{ template "Interface" $interface }}
 {{- end}}
 {{- end -}}
 `