Created SerializedUserDataManager.

ios/web/navigation/crw_serialized_navigation_manager.mm

 // Copyright 2015 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.
 
 #import "ios/web/navigation/crw_serialized_navigation_manager.h"
 
 #include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
 #import "ios/web/navigation/crw_session_certificate_policy_manager.h"
 
 namespace {
 // Serialization keys used in NSCoding functions.
 NSString* const kCertificatePolicyManagerKey = @"certificatePolicyManager";
 NSString* const kCurrentNavigationIndexKey = @"currentNavigationIndex";
 NSString* const kEntriesKey = @"entries";
 NSString* const kLastVisitedTimestampKey = @"lastVisitedTimestamp";
 NSString* const kOpenerIDKey = @"openerId";
 NSString* const kOpenedByDOMKey = @"openedByDOM";
 NSString* const kOpenerNavigationIndexKey = @"openerNavigationIndex";
 NSString* const kPreviousNavigationIndexKey = @"previousNavigationIndex";
 NSString* const kTabIDKey = @"tabId";
 NSString* const kWindowNameKey = @"windowName";
 NSString* const kXCallbackParametersKey = @"xCallbackParameters";
+NSString* const kSerializedUserDataKey = @"serializedUserData";
 }
 
 @interface CRWSerializedNavigationManager () {
+  // |serializedUserData| is backed with an NSMutableDictionary so that
+  // NavigationManager's legacy properties can be decoded and added directly to
+  // the dictionary.
+  base::scoped_nsobject<NSMutableDictionary> _serializedUserData;
+
   base::mac::ObjCPropertyReleaser
       _propertyReleaser_CRWSerializedNavigationManager;
 }
 @end
 
 @implementation CRWSerializedNavigationManager
 
 @synthesize tabID = _tabID;
 @synthesize openerID = _openerID;
 @synthesize openedByDOM = _openedByDOM;
@@ skipping 36 matching lines @@
     if (!_entries.count)
       _currentNavigationIndex = -1;
     _sessionCertificatePolicyManager =
         [[decoder decodeObjectForKey:kCertificatePolicyManagerKey] retain];
     if (!_sessionCertificatePolicyManager) {
       _sessionCertificatePolicyManager =
           [[CRWSessionCertificatePolicyManager alloc] init];
     }
     _XCallbackParameters =
         [[decoder decodeObjectForKey:kXCallbackParametersKey] retain];
+    _serializedUserData.reset([[NSMutableDictionary alloc] initWithDictionary:
+        [decoder decodeObjectForKey:kSerializedUserDataKey]]);
   }
   return self;
 }
 
 - (void)encodeWithCoder:(NSCoder*)coder {
   [coder encodeObject:self.tabID forKey:kTabIDKey];
   [coder encodeObject:self.openerID forKey:kOpenerIDKey];
   [coder encodeBool:self.openedByDOM forKey:kOpenedByDOMKey];
   [coder encodeInt:self.openerNavigationIndex forKey:kOpenerNavigationIndexKey];
   [coder encodeObject:self.windowName forKey:kWindowNameKey];
   [coder encodeInt:self.currentNavigationIndex
             forKey:kCurrentNavigationIndexKey];
   [coder encodeInt:self.previousNavigationIndex
             forKey:kPreviousNavigationIndexKey];
   [coder encodeDouble:self.lastVisitedTimestamp
                forKey:kLastVisitedTimestampKey];
   [coder encodeObject:self.entries forKey:kEntriesKey];
   [coder encodeObject:self.sessionCertificatePolicyManager
                forKey:kCertificatePolicyManagerKey];
   [coder encodeObject:self.XCallbackParameters forKey:kXCallbackParametersKey];
   // rendererInitiated is deliberately not preserved, as upstream.
+  [coder encodeObject:self.serializedUserData forKey:kSerializedUserDataKey];
+}
+
+- (void)setSerializedUserData:(NSDictionary*)serializedUserData {
+  _serializedUserData.reset(
+      [[NSMutableDictionary alloc] initWithDictionary:serializedUserData]);
+}
+
+- (NSDictionary*)serializedUserData {
+  return _serializedUserData;

[Eugene But (OOO till 7-30), 2015/09/24 21:39:25]

NIT: Maybe return an autoreleased copy here (same as in
GetSerializationDictionary)?

 }
 
 @end