PlzNavigate: implement CommitNavigation on the browser side

content/browser/frame_host/navigation_controller_impl.cc

 // Copyright 2013 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/browser/frame_host/navigation_controller_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 1717 matching lines @@
   // when the tab is being destroyed for shutdown, since it won't return to
   // NavigateToEntry in that case.)  http://crbug.com/347742.
   CHECK(!in_navigate_to_pending_entry_ || delegate_->IsBeingDestroyed());
 
   if (pending_entry_index_ == -1)
     delete pending_entry_;
   pending_entry_ = NULL;
   pending_entry_index_ = -1;
 }
 
+void NavigationControllerImpl::FillHistoryParametersForNavigationEntry(
+    const NavigationEntryImpl& entry,
+    int* pending_history_list_offset,
+    int* current_history_list_offset,
+    int* current_history_list_length) const {
+  if (entry.should_clear_history_list()) {
+    // Set the history list related parameters to the same values a
+    // NavigationController would return before its first navigation. This will
+    // fully clear the RenderView's view of the session history.
+    *pending_history_list_offset = -1;
+    *current_history_list_offset = -1;
+    *current_history_list_length = 0;
+  } else {
+    *pending_history_list_offset = GetIndexOfEntry(&entry);
+    *current_history_list_offset = GetLastCommittedEntryIndex();
+    *current_history_list_length = GetEntryCount();
+  }
+}
+
 void NavigationControllerImpl::DiscardTransientEntry() {
   if (transient_entry_index_ == -1)
     return;
   entries_.erase(entries_.begin() + transient_entry_index_);
   if (last_committed_entry_index_ > transient_entry_index_)
     last_committed_entry_index_--;
   transient_entry_index_ = -1;
 }
 
 int NavigationControllerImpl::GetEntryIndexWithPageID(
@@ skipping 40 matching lines @@
     }
   }
 }
 
 void NavigationControllerImpl::SetGetTimestampCallbackForTest(
     const base::Callback<base::Time()>& get_timestamp_callback) {
   get_timestamp_callback_ = get_timestamp_callback;
 }
 
 }  // namespace content