Fix crashes due to gfx::Image unsafe thread passing

components/enhanced_bookmarks/test_image_store.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 COMPONENTS_ENHANCED_BOOKMARKS_TEST_IMAGE_STORE_H_
 #define COMPONENTS_ENHANCED_BOOKMARKS_TEST_IMAGE_STORE_H_
 
 #include "components/enhanced_bookmarks/image_store.h"
 
 // The TestImageStore is an implementation of ImageStore that keeps all its
 // data in memory. When deallocated all the associations are lost.
 // Used in tests.
 class TestImageStore : public ImageStore {
  public:
   TestImageStore();
   bool HasKey(const GURL& page_url) override;
-  void Insert(const GURL& page_url,
-              const enhanced_bookmarks::ImageRecord& image) override;
+  void Insert(
+      const GURL& page_url,
+      scoped_refptr<enhanced_bookmarks::ImageRecord> image_record) override;
   void Erase(const GURL& page_url) override;
-  enhanced_bookmarks::ImageRecord Get(const GURL& page_url) override;
+  scoped_refptr<enhanced_bookmarks::ImageRecord> Get(
+      const GURL& page_url) override;
   gfx::Size GetSize(const GURL& page_url) override;
   void GetAllPageUrls(std::set<GURL>* urls) override;
   void ClearAll() override;
   int64 GetStoreSizeInBytes() override;
 
  protected:
   ~TestImageStore() override;
 
  private:
-  typedef std::map<const GURL, enhanced_bookmarks::ImageRecord> ImageMap;
+  typedef std::map<const GURL, scoped_refptr<enhanced_bookmarks::ImageRecord>>
+      ImageMap;
   ImageMap store_;
 
   DISALLOW_COPY_AND_ASSIGN(TestImageStore);
 };
 
 #endif  // COMPONENTS_ENHANCED_BOOKMARKS_TEST_IMAGE_STORE_H_