Restructuring NavigationController functionalities from ContentViewCore to NavigationController

content/public/android/java/src/org/chromium/content/browser/NavigationHistory.java

-// Copyright 2012 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.
-
-package org.chromium.content.browser;
-
-import java.util.ArrayList;
-
-/**
- * {@link NavigationHistory} captures a snapshot of the navigation history of a
- * {@link ContentViewCore}. It is a copy and will not be updated as navigation
- * occurs on the source {@link ContentViewCore}.
- */
-public class NavigationHistory {
-
-    private final ArrayList<NavigationEntry> mEntries = new ArrayList<NavigationEntry>();
-    private int mCurrentEntryIndex;
-
-    protected void addEntry(NavigationEntry entry) {
-        mEntries.add(entry);
-    }
-
-    /* package */ void setCurrentEntryIndex(int currentEntryIndex) {
-        mCurrentEntryIndex = currentEntryIndex;
-    }
-
-    /**
-     * @return The number of entries in the history.
-     */
-    public int getEntryCount() {
-        return mEntries.size();
-    }
-
-    /**
-     * Returns the {@link NavigationEntry} for the given index.
-     */
-    public NavigationEntry getEntryAtIndex(int index) {
-        return mEntries.get(index);
-    }
-
-    /**
-     * Returns the index of the entry the {@link ContentViewCore} was navigated to
-     * when the history was fetched.
-     */
-    public int getCurrentEntryIndex() {
-        return mCurrentEntryIndex;
-    }
-
-}