[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_last_error.cc

 // Copyright 2017 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 "extensions/renderer/api_last_error.h"
+#include "extensions/renderer/bindings/api_last_error.h"
 
 #include "gin/converter.h"
 #include "gin/handle.h"
 #include "gin/object_template_builder.h"
 #include "gin/wrappable.h"
 
 namespace extensions {
 
 namespace {
 
@@ skipping 224 matching lines @@
   // Access through GetPrivate() so we don't trigger accessed().
   if (!parent->GetPrivate(context, key).ToLocal(&error))
     return false;
 
   LastErrorObject* last_error = nullptr;
   return gin::Converter<LastErrorObject*>::FromV8(context->GetIsolate(), error,
                                                   &last_error);
 }
 
 }  // namespace extensions