[Enhanced Bookmark]Upstream image fetching code in android

chrome/browser/enhanced_bookmarks/android/enhanced_bookmark_tab_helper.h

+// Copyright 2014 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_ENHANCED_BOOKMARKS_ANDROID_ENHANCED_BOOKMARK_TAB_HELPER_H_
+#define CHROME_BROWSER_ENHANCED_BOOKMARKS_ANDROID_ENHANCED_BOOKMARK_TAB_HELPER_H_
+
+#include "base/macros.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+class EnhancedBookmarkTabHelper
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<EnhancedBookmarkTabHelper> {
+ public:
+  ~EnhancedBookmarkTabHelper() override {};
+
+  // content::WebContentsObserver overrides.
+  void DocumentOnLoadCompletedInMainFrame() override;
+
+ private:
+  explicit EnhancedBookmarkTabHelper(content::WebContents* contents);
+  friend class content::WebContentsUserData<EnhancedBookmarkTabHelper>;
+
+  DISALLOW_COPY_AND_ASSIGN(EnhancedBookmarkTabHelper);
+};
+
+#endif  // CHROME_BROWSER_ENHANCED_BOOKMARKS_ANDROID_ENHANCED_BOOKMARK_TAB_HELPER_H_