Migrate HostZoomMap to live in StoragePartition.

content/public/browser/zoom_level_prefs_delegate.h

+// Copyright (c) 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 CONTENT_PUBLIC_BROWSER_ZOOM_LEVEL_PREFS_DELEGATE
+#define CONTENT_PUBLIC_BROWSER_ZOOM_LEVEL_PREFS_DELEGATE
+
+#include "base/memory/ref_counted.h"
+
+class PrefService;
+
+namespace base {
+class FilePath;
+}  // namespace base
+
+namespace content {
+
+class HostZoomMap;
+
+class ZoomLevelPrefsDelegate : public base::RefCounted<ZoomLevelPrefsDelegate> {

[awong, 2014/08/12 21:07:07]

Does this need to be refcounted?

[wjmaclean, 2014/08/13 17:16:03]

Hmmm, no.

Done.

+ public:
+  virtual void InitZoomLevels(const base::FilePath& file_path,
+                              HostZoomMap* host_zoom_map) = 0;
+  // Expose for tests.
+  virtual PrefService* GetPrefs() = 0;
+
+ protected:
+  friend class base::RefCounted<ZoomLevelPrefsDelegate>;
+
+  virtual ~ZoomLevelPrefsDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ZOOM_LEVEL_PREFS_DELEGATE