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_delegate.h"
 #include "content/public/common/push_messaging_status.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 }
 
 namespace storage {
 class ExternalMountPoints;
@@ skipping 81 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);
 
   ~BrowserContext() override;
 
+  // Override to provide for creation of a delegate that can be used to persist

[Charlie Reis, 2014/11/04 23:43:17]

This is too wordy to follow.  Maybe:

Creates a delegate to initialize a HostZoomMap and persist its information. 
This is called...

[wjmaclean, 2014/11/05 21:55:42]

Done.

+  // 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<ZoomLevelDelegate> CreateZoomLevelDelegate(
+      const base::FilePath& partition_path);

[Charlie Reis, 2014/11/04 23:43:17]

This should be pure abstract, like all the other methods here.

[wjmaclean, 2014/11/05 21:55:42]

Done.

+
   // 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 40 matching lines @@
   virtual PushMessagingService* GetPushMessagingService() = 0;
 
   // Returns the SSL host state decisions for this context. The context may
   // return NULL, implementing the default exception storage strategy.
   virtual SSLHostStateDelegate* GetSSLHostStateDelegate() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_