Simplify EncodePageState to return no value.

content/renderer/history_serialization.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 "content/renderer/history_serialization.h"
 
 #include <stddef.h>
 
 #include "base/strings/nullable_string16.h"
 #include "content/child/web_url_request_util.h"
@@ skipping 104 matching lines @@
 }
 
 }  // namespace
 
 PageState HistoryEntryToPageState(HistoryEntry* entry) {
   ExplodedPageState state;
   RecursivelyGenerateFrameState(entry->root_history_node(), &state.top,
                                 &state.referenced_files);
 
   std::string encoded_data;
-  if (!EncodePageState(state, &encoded_data))
-    return PageState();
-
+  EncodePageState(state, &encoded_data);
   return PageState::CreateFromEncodedData(encoded_data);
 }
 
 PageState SingleHistoryItemToPageState(const WebHistoryItem& item) {
   ExplodedPageState state;
   ToNullableString16Vector(item.getReferencedFilePaths(),
                            &state.referenced_files);
   GenerateFrameStateFromItem(item, &state.top);
 
   std::string encoded_data;
-  if (!EncodePageState(state, &encoded_data))
-    return PageState();
-
+  EncodePageState(state, &encoded_data);
   return PageState::CreateFromEncodedData(encoded_data);
 }
 
 std::unique_ptr<HistoryEntry> PageStateToHistoryEntry(
     const PageState& page_state) {
   ExplodedPageState state;
   if (!DecodePageState(page_state.ToEncodedData(), &state))
     return std::unique_ptr<HistoryEntry>();
 
   std::unique_ptr<HistoryEntry> entry(new HistoryEntry());
   RecursivelyGenerateHistoryItem(state.top, entry->root_history_node());
 
   return entry;
 }
 
 }  // namespace content