Moved NavigationManagerImpl serialization out of CRWSessionController.

ios/web/public/crw_navigation_manager_storage.mm

Index: ios/web/public/crw_navigation_manager_storage.mm
diff --git a/ios/web/public/crw_navigation_manager_storage.mm b/ios/web/public/crw_navigation_manager_storage.mm
new file mode 100644
index 0000000000000000000000000000000000000000..18fce137bf6d5b5fed5a19d891e6802dd7ee7941
--- /dev/null
+++ b/ios/web/public/crw_navigation_manager_storage.mm
@@ -0,0 +1,88 @@
+// 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/public/crw_navigation_manager_storage.h"
+
+#import "ios/web/navigation/crw_session_certificate_policy_manager.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+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";
+}
+
+@implementation CRWNavigationManagerStorage
+
+@synthesize tabID = _tabID;
+@synthesize openerID = _openerID;
+@synthesize openedByDOM = _openedByDOM;
+@synthesize openerNavigationIndex = _openerNavigationIndex;
+@synthesize windowName = _windowName;
+@synthesize currentNavigationIndex = _currentNavigationIndex;
+@synthesize previousNavigationIndex = _previousNavigationIndex;
+@synthesize lastVisitedTimestamp = _lastVisitedTimestamp;
+@synthesize entries = _entries;
+@synthesize sessionCertificatePolicyManager = _sessionCertificatePolicyManager;
+
+- (instancetype)initWithCoder:(nonnull NSCoder*)decoder {
+  self = [super init];
+  if (self) {
+    _tabID = [[decoder decodeObjectForKey:kTabIDKey] copy];
+    _windowName = [[decoder decodeObjectForKey:kWindowNameKey] copy];
+    _openerID = [[decoder decodeObjectForKey:kOpenerIDKey] copy];
+    _openedByDOM = [decoder decodeBoolForKey:kOpenedByDOMKey];
+    _openerNavigationIndex =
+        [decoder decodeIntForKey:kOpenerNavigationIndexKey];
+    _currentNavigationIndex =
+        [decoder decodeIntForKey:kCurrentNavigationIndexKey];
+    _previousNavigationIndex =
+        [decoder decodeIntForKey:kPreviousNavigationIndexKey];
+    _lastVisitedTimestamp =
+        [decoder decodeDoubleForKey:kLastVisitedTimestampKey];
+    _entries = [[NSMutableArray alloc]
+        initWithArray:[decoder decodeObjectForKey:kEntriesKey]];
+    // Prior to M34, 0 was used as "no index" instead of -1; adjust for that.
+    if (!_entries.count)
+      _currentNavigationIndex = -1;
+    _sessionCertificatePolicyManager =
+        [decoder decodeObjectForKey:kCertificatePolicyManagerKey];
+    if (!_sessionCertificatePolicyManager) {
+      _sessionCertificatePolicyManager =
+          [[CRWSessionCertificatePolicyManager alloc] init];
+    }
+  }
+  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];
+  // rendererInitiated is deliberately not preserved, as upstream.
+}
+
+@end