Fix gin's array buffer class for component build

gin/array_buffer.cc

 // Copyright 2013 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 <stdlib.h>
 
 #include "base/logging.h"
 #include "gin/array_buffer.h"
 #include "gin/per_isolate_data.h"
 
@@ skipping 157 matching lines @@
 ArrayBufferView::ArrayBufferView(v8::Isolate* isolate,
                                  v8::Handle<v8::ArrayBufferView> view)
     : array_buffer_(isolate, view->Buffer()),
       offset_(view->ByteOffset()),
       num_bytes_(view->ByteLength()) {
 }
 
 ArrayBufferView::~ArrayBufferView() {
 }
 
+ArrayBufferView& ArrayBufferView::operator=(const ArrayBufferView& other) {
+  array_buffer_ = other.array_buffer_;
+  offset_ = other.offset_;
+  num_bytes_ = other.num_bytes_;
+  return *this;
+}
+
+
 // Converter<ArrayBufferView> -------------------------------------------------
 
 bool Converter<ArrayBufferView>::FromV8(v8::Isolate* isolate,
                                         v8::Handle<v8::Value> val,
                                         ArrayBufferView* out) {
   if (!val->IsArrayBufferView())
     return false;
   *out = ArrayBufferView(isolate, v8::Handle<v8::ArrayBufferView>::Cast(val));
   return true;
 }
 
 }  // namespace gin