Workaround for reading bad PageState from session history.

components/sessions/content/content_serialized_navigation_builder.cc

 // Copyright 2014 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 "components/sessions/content/content_serialized_navigation_builder.h"
 
 #include "components/sessions/core/serialized_navigation_entry.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
 
 namespace sessions {
 
 // static
 SerializedNavigationEntry
 ContentSerializedNavigationBuilder::FromNavigationEntry(
     int index,
     const content::NavigationEntry& entry) {
   SerializedNavigationEntry navigation;
   navigation.index_ = index;
   navigation.unique_id_ = entry.GetUniqueID();
   navigation.referrer_url_ = entry.GetReferrer().url;
   navigation.referrer_policy_ = entry.GetReferrer().policy;
   navigation.virtual_url_ = entry.GetVirtualURL();
   navigation.title_ = entry.GetTitle();
+  DLOG(INFO) << "csnb from: PageState:" << entry.GetPageState().ToEncodedData();
   navigation.encoded_page_state_ = entry.GetPageState().ToEncodedData();
   navigation.transition_type_ = entry.GetTransitionType();
   navigation.has_post_data_ = entry.GetHasPostData();
   navigation.post_id_ = entry.GetPostID();
   navigation.original_request_url_ = entry.GetOriginalRequestURL();
   navigation.is_overriding_user_agent_ = entry.GetIsOverridingUserAgent();
   navigation.timestamp_ = entry.GetTimestamp();
   navigation.is_restored_ = entry.IsRestored();
   entry.GetExtraData(kSearchTermsKey, &navigation.search_terms_);
   if (entry.GetFavicon().valid)
@@ skipping 18 matching lines @@
           content::Referrer::SanitizeForRequest(
               navigation->virtual_url_,
               content::Referrer(navigation->referrer_url_, policy)),
           // Use a transition type of reload so that we don't incorrectly
           // increase the typed count.
           ui::PAGE_TRANSITION_RELOAD, false,
           // The extra headers are not sync'ed across sessions.
           std::string(), browser_context));
 
   entry->SetTitle(navigation->title_);
+  DLOG(INFO) << "csnb to: PageState: " << navigation->encoded_page_state_;
   entry->SetPageState(content::PageState::CreateFromEncodedData(
       navigation->encoded_page_state_));
   entry->SetPageID(page_id);
   entry->SetHasPostData(navigation->has_post_data_);
   entry->SetPostID(navigation->post_id_);
   entry->SetOriginalRequestURL(navigation->original_request_url_);
   entry->SetIsOverridingUserAgent(navigation->is_overriding_user_agent_);
   entry->SetTimestamp(navigation->timestamp_);
   entry->SetExtraData(kSearchTermsKey, navigation->search_terms_);
   entry->SetHttpStatusCode(navigation->http_status_code_);
@@ skipping 16 matching lines @@
   std::vector<std::unique_ptr<content::NavigationEntry>> entries;
   entries.reserve(navigations.size());
   for (const auto& navigation : navigations) {
     entries.push_back(ToNavigationEntry(&navigation, page_id, browser_context));
     ++page_id;
   }
   return entries;
 }
 
 }  // namespace sessions