Changed NavigationController access to through tab in Java code

chrome/android/java/src/org/chromium/chrome/browser/navigation/TabWebContentsNavigationHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/navigation/TabWebContentsNavigationHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/navigation/TabWebContentsNavigationHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/navigation/TabWebContentsNavigationHandler.java
new file mode 100644
index 0000000000000000000000000000000000000000..d0b428b114e5e1c1c3e4b0f8a4540f5afbb327d6
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/navigation/TabWebContentsNavigationHandler.java
@@ -0,0 +1,148 @@
+// Copyright 2016 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.chrome.browser.navigation;
+
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.content_public.browser.NavigationController;
+import org.chromium.content_public.browser.NavigationEntry;
+import org.chromium.content_public.browser.NavigationHistory;
+import org.chromium.content_public.browser.WebContents;
+
+/**
+ * Provides navigation functionalities for Chrome. It wraps the content layer NavigationController
+ * and delegates all calls to it.
+ */
+public class TabWebContentsNavigationHandler implements NavigationHandler {
+    private NavigationController mNavigationController;
+
+    public TabWebContentsNavigationHandler(WebContents webContents) {
+        mNavigationController = webContents.getNavigationController();
+    }
+
+    @Override
+    public boolean canGoBack() {
+        return mNavigationController.canGoBack();
+    }
+
+    @Override
+    public boolean canGoForward() {
+        return mNavigationController.canGoForward();
+    }
+
+    @Override
+    public boolean canGoToOffset(int offset) {
+        return mNavigationController.canGoToOffset(offset);
+    }
+
+    @Override
+    public void goToOffset(int offset) {
+        mNavigationController.goToOffset(offset);
+    }
+
+    @Override
+    public void goToNavigationIndex(int index) {
+        mNavigationController.goToNavigationIndex(index);
+    }
+
+    @Override
+    public void goBack() {
+        mNavigationController.goBack();
+    }
+
+    @Override
+    public void goForward() {
+        mNavigationController.goForward();
+    }
+
+    @Override
+    public boolean isInitialNavigation() {
+        return mNavigationController.isInitialNavigation();
+    }
+
+    @Override
+    public void loadIfNecessary() {
+        mNavigationController.loadIfNecessary();
+    }
+
+    @Override
+    public void requestRestoreLoad() {
+        mNavigationController.requestRestoreLoad();
+    }
+
+    @Override
+    public void reload(boolean checkForRepost) {
+        mNavigationController.reload(checkForRepost);
+    }
+
+    @Override
+    public void reloadToRefreshContent(boolean checkForRepost) {
+        mNavigationController.reloadToRefreshContent(checkForRepost);
+    }
+
+    @Override
+    public void reloadBypassingCache(boolean checkForRepost) {
+        mNavigationController.reloadBypassingCache(checkForRepost);
+    }
+
+    @Override
+    public void reloadDisableLoFi(boolean checkForRepost) {
+        mNavigationController.reloadDisableLoFi(checkForRepost);
+    }
+
+    @Override
+    public void cancelPendingReload() {
+        mNavigationController.cancelPendingReload();
+    }
+
+    @Override
+    public void continuePendingReload() {
+        mNavigationController.continuePendingReload();
+    }
+
+    @Override
+    public void loadUrl(LoadUrlParams params) {
+        mNavigationController.loadUrl(params);
+    }
+
+    @Override
+    public NavigationHistory getDirectedNavigationHistory(boolean isForward, int itemLimit) {
+        return mNavigationController.getDirectedNavigationHistory(isForward, itemLimit);
+    }
+
+    @Override
+    public String getOriginalUrlForVisibleNavigationEntry() {
+        return mNavigationController.getOriginalUrlForVisibleNavigationEntry();
+    }
+
+    @Override
+    public void clearSslPreferences() {
+        mNavigationController.clearSslPreferences();
+    }
+
+    @Override
+    public boolean getUseDesktopUserAgent() {
+        return mNavigationController.getUseDesktopUserAgent();
+    }
+
+    @Override
+    public void setUseDesktopUserAgent(boolean override, boolean reloadOnChange) {
+        mNavigationController.setUseDesktopUserAgent(override, reloadOnChange);
+    }
+
+    @Override
+    public NavigationEntry getEntryAtIndex(int index) {
+        return mNavigationController.getEntryAtIndex(index);
+    }
+
+    @Override
+    public int getLastCommittedEntryIndex() {
+        return mNavigationController.getLastCommittedEntryIndex();
+    }
+
+    @Override
+    public boolean removeEntryAtIndex(int index) {
+        return mNavigationController.removeEntryAtIndex(index);
+    }
+}