Workaround for reading bad PageState from session history.

components/sessions/content/content_serialized_navigation_builder.cc

Index: components/sessions/content/content_serialized_navigation_builder.cc
diff --git a/components/sessions/content/content_serialized_navigation_builder.cc b/components/sessions/content/content_serialized_navigation_builder.cc
index 072f72e22e95fcee0f7846d451791d35b3459bb4..41e9576ca54567a55a8239ab9725349195dc57e4 100644
--- a/components/sessions/content/content_serialized_navigation_builder.cc
+++ b/components/sessions/content/content_serialized_navigation_builder.cc
@@ -26,6 +26,7 @@ ContentSerializedNavigationBuilder::FromNavigationEntry(
   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();
@@ -64,6 +65,7 @@ ContentSerializedNavigationBuilder::ToNavigationEntry(
           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);