Add/resurrect support for bundles of WebStore items.

chrome/browser/safe_image_fetcher.h

+// 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.
+
+#ifndef CHROME_BROWSER_SAFE_IMAGE_FETCHER_H_
+#define CHROME_BROWSER_SAFE_IMAGE_FETCHER_H_
+
+#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/image_decoder.h"
+#include "net/url_request/url_fetcher_delegate.h"
+#include "url/gurl.h"
+
+class SkBitmap;
+
+namespace net {
+class URLFetcher;
+class URLRequestContextGetter;
+}
+
+class SafeImageFetcher : public ImageDecoder::ImageRequest,

[asargent_no_longer_on_chrome, 2015/03/26 18:12:51]

nit: 

"Every class definition should have an accompanying comment that describes what
it is for and how it should be used."

http://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Class_Comments

[Marc Treib, 2015/03/27 11:52:12]

Done.

+                         public net::URLFetcherDelegate {
+ public:
+  using GetImageCallback = base::Callback<void(const SkBitmap&)>;
+
+  SafeImageFetcher(const GURL& url,
+                   net::URLRequestContextGetter* context_getter,
+                   const GetImageCallback& callback);
+  ~SafeImageFetcher() override;
+
+ private:
+  // net::URLFetcherDelegate implementation.
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
+
+  // ImageDecoder::ImageRequest implementation.
+  void OnImageDecoded(const SkBitmap& decoded_image) override;
+  void OnDecodeImageFailed() override;
+
+  scoped_ptr<net::URLFetcher> url_fetcher_;
+  GetImageCallback callback_;
+};
+
+#endif  // CHROME_BROWSER_SAFE_IMAGE_FETCHER_H_