Add setting to isolate zoom changes by default.

chrome/browser/profiles/off_the_record_profile_impl.cc

 // 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.
 
 #include "chrome/browser/profiles/off_the_record_profile_impl.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 232 matching lines @@
 }
 
 base::FilePath OffTheRecordProfileImpl::GetPath() const {
   return profile_->GetPath();
 }
 
 std::unique_ptr<content::ZoomLevelDelegate>
 OffTheRecordProfileImpl::CreateZoomLevelDelegate(
     const base::FilePath& partition_path) {
   return base::MakeUnique<ChromeZoomLevelOTRDelegate>(
+      GetPrefs(), GetPath(), partition_path,
       zoom::ZoomEventManager::GetForBrowserContext(this)->GetWeakPtr());
 }
 
 scoped_refptr<base::SequencedTaskRunner>
 OffTheRecordProfileImpl::GetIOTaskRunner() {
   return profile_->GetIOTaskRunner();
 }
 
 bool OffTheRecordProfileImpl::IsOffTheRecord() const {
   return true;
@@ skipping 291 matching lines @@
 PrefProxyConfigTracker* OffTheRecordProfileImpl::CreateProxyConfigTracker() {
 #if defined(OS_CHROMEOS)
   if (chromeos::ProfileHelper::IsSigninProfile(this)) {
     return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
         g_browser_process->local_state());
   }
 #endif  // defined(OS_CHROMEOS)
   return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
       GetPrefs(), g_browser_process->local_state());
 }