Local salient image storage for enhanced bookmark experiment.

components/enhanced_bookmarks/persistent_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_PERSISTENT_IMAGE_STORE_H_
+#define COMPONENTS_ENHANCED_BOOKMARKS_PERSISTENT_IMAGE_STORE_H_
+
+#include "components/enhanced_bookmarks/image_store.h"
+
+#include "base/files/file_path.h"
+#include "sql/connection.h"
+#include "sql/init_status.h"
+
+// The PersistentImageStore is an implementation of ImageStore that persists its
+// data on disk.
+class PersistentImageStore : public ImageStore {
+ public:
+  // Creates a PersistentImageStore in the directory at the given path.
+  explicit PersistentImageStore(const base::FilePath& path);
+  virtual bool HasKey(const GURL& page_url) OVERRIDE;
+  virtual void Insert(const GURL& page_url,
+                      const GURL& image_url,
+                      const gfx::Image& image) OVERRIDE;
+  virtual void Erase(const GURL& page_url) OVERRIDE;
+  virtual std::pair<gfx::Image, GURL> Get(const GURL& page_url) OVERRIDE;
+  virtual gfx::Size GetSize(const GURL& page_url) OVERRIDE;
+  virtual void GetAllPageUrls(std::set<GURL>* urls) OVERRIDE;
+  virtual void ClearAll() OVERRIDE;
+
+ protected:
+  virtual ~PersistentImageStore();
+
+ private:
+  sql::InitStatus OpenDatabase();
+
+  const base::FilePath path_;
+  sql::Connection db_;
+
+  DISALLOW_COPY_AND_ASSIGN(PersistentImageStore);
+};
+
+#endif  // COMPONENTS_ENHANCED_BOOKMARKS_PERSISTENT_IMAGE_STORE_H_