Introduce ChromeZoomLevelPref, make zoom level prefs independent of profile prefs.

chrome/browser/profiles/profile.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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_H_
 
 #include <string>
@@ skipping 200 matching lines @@
   virtual history::TopSites* GetTopSitesWithoutCreating() = 0;
 
   // Accessor. The instance is created upon first access.
   virtual ExtensionSpecialStoragePolicy*
       GetExtensionSpecialStoragePolicy() = 0;
 
   // Retrieves a pointer to the PrefService that manages the
   // preferences for this user profile.
   virtual PrefService* GetPrefs() = 0;
 
+  // Retrieves a pointer to the PrefService that manages the default zoom
+  // level and the per-host zoom levels for this user profile.
+  // TODO(wjmaclean): Remove this when HostZoomMap migrates to StoragePartition.
+  virtual PrefService* GetZoomLevelPrefs();

[Bernhard Bauer, 2014/09/12 10:28:49]

Instead of adding a new method to Profile, could you make this a KeyedService?

[wjmaclean, 2014/09/16 18:44:44]

I could make it a keyede service, but hopefully this will be removed within a
week (or at most two) from when this CL lands, so is it worth it?

+
   // Retrieves a pointer to the PrefService that manages the preferences
   // for OffTheRecord Profiles.  This PrefService is lazily created the first
   // time that this method is called.
   virtual PrefService* GetOffTheRecordPrefs() = 0;
 
   // Returns the main request context.
   virtual net::URLRequestContextGetter* GetRequestContext() = 0;
 
   // Returns the request context used for extension-related requests.  This
   // is only used for a separate cookie store currently.
@@ skipping 181 matching lines @@
 struct hash<Profile*> {
   std::size_t operator()(Profile* const& p) const {
     return reinterpret_cast<std::size_t>(p);
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 #endif
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_H_