Migrate HostZoomMap to live in StoragePartition.

content/public/browser/browser_context.h

 // Copyright (c) 2012 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_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include "base/callback_forward.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/supports_user_data.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/zoom_level_prefs_store.h"
 #include "content/public/common/push_messaging_status.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 }
 
 namespace fileapi {
 class ExternalMountPoints;
@@ skipping 79 matching lines @@
   // thread before they use BrowserContext, they should call this to make sure
   // that the ResourceContext is ready.
   static void EnsureResourceContextInitialized(BrowserContext* browser_context);
 
   // Tells the HTML5 objects on this context to persist their session state
   // across the next restart.
   static void SaveSessionState(BrowserContext* browser_context);
 
   virtual ~BrowserContext();
 
+  // Override to provide for creation of a delegate that can be used to persist
+  // data stored in a HostZoomMap. The delegate is used to initialize the
+  // HostZoomMap and persist its information. This is called during creation
+  // of each StoragePartition.
+  virtual scoped_ptr<ZoomLevelPrefsStore> CreateZoomLevelPrefsStore();
+
   // Returns the path of the directory where this context's data is stored.
   virtual base::FilePath GetPath() const = 0;
 
   // Return whether this context is incognito. Default is false.
   virtual bool IsOffTheRecord() const = 0;
 
   // Returns the request context information associated with this context.  Call
   // this only on the UI thread, since it can send notifications that should
   // happen on the UI thread.
   // TODO(creis): Remove this version in favor of the one below.
@@ skipping 53 matching lines @@
 struct hash<content::BrowserContext*> {
   std::size_t operator()(content::BrowserContext* const& p) const {
     return reinterpret_cast<std::size_t>(p);
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 #endif
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_