Revert of Fix HistoryEntry corruption when commit isn't for provisional entry.

content/renderer/history_controller.cc

Index: content/renderer/history_controller.cc
diff --git a/content/renderer/history_controller.cc b/content/renderer/history_controller.cc
index 0a6cd634f3546944f4ee4dc7a8bdad8bc6a80168..e459d9a3f7c1722f4ec68424c162ea9068c5cbf0 100644
--- a/content/renderer/history_controller.cc
+++ b/content/renderer/history_controller.cc
@@ -187,14 +187,7 @@
     case blink::WebBackForwardCommit:
       if (!provisional_entry_)
         return;
-      // Commit the provisional entry, but only if this back/forward item
-      // matches it.  Otherwise it could be a commit from an earlier attempt to
-      // go back/forward, and we should leave the provisional entry in place.
-      if (HistoryEntry::HistoryNode* node =
-              provisional_entry_->GetHistoryNodeForFrame(frame)) {
-        if (node->item().itemSequenceNumber() == item.itemSequenceNumber())
-          current_entry_.reset(provisional_entry_.release());
-      }
+      current_entry_.reset(provisional_entry_.release());
       if (HistoryEntry::HistoryNode* node =
               current_entry_->GetHistoryNodeForFrame(frame)) {
         node->set_item(item);