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"
@@ skipping 24 matching lines @@
 class BlobHandle;
 class BrowserPluginGuestManager;
 class DownloadManager;
 class DownloadManagerDelegate;
 class IndexedDBContext;
 class PushMessagingService;
 class ResourceContext;
 class SiteInstance;
 class StoragePartition;
 class SSLHostStateDelegate;
+class ZoomLevelPrefsDelegate;
 
 // This class holds the context needed for a browsing session.
 // It lives on the UI thread. All these methods must only be called on the UI
 // thread.
 class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
  public:
   static DownloadManager* GetDownloadManager(BrowserContext* browser_context);
 
   // Returns BrowserContext specific external mount points. It may return NULL
   // if the context doesn't have any BrowserContext specific external mount
@@ skipping 45 matching lines @@
   // BrowserContext initializs the corresponding getters when its objects are
   // created, but if the embedder wants to pass the ResourceContext to another
   // 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);
 
+  // Changes the default zoom level for all current storage partitions.
+  static void SetDefaultZoomLevel(BrowserContext* browser_context,
+                                  double level);
+
   virtual ~BrowserContext();
 
+  // Returns the default zoom level.
+  virtual double GetDefaultZoomLevel() const;
+
+  // Returns a delegate used to persist zoom level preference, or NULL if
+  // zoom levels are not persisted. The caller takes ownership of the delegate.

[awong, 2014/08/12 21:07:06]

This comment doesn't give me enough info to understand why we'd want to call
this, or why one would override the default. Can we expand a bit?

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

Done.

+  virtual ZoomLevelPrefsDelegate* CreateZoomLevelPrefsDelegate();
+
   // 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_