Tentative fix for scroll event related crashes on the NTP

chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.java

 // Copyright 2015 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.omnibox;
 
 import static org.chromium.chrome.browser.toolbar.ToolbarPhone.URL_FOCUS_CHANGE_ANIMATION_DURATION_MS;
 
 import android.Manifest;
 import android.animation.Animator;
@@ skipping 42 matching lines @@
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.CollectionUtil;
 import org.chromium.base.CommandLine;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.ChromeSwitches;
+import org.chromium.chrome.browser.NativePage;
 import org.chromium.chrome.browser.WindowDelegate;
 import org.chromium.chrome.browser.appmenu.AppMenuButtonHelper;
 import org.chromium.chrome.browser.ntp.NativePageFactory;
 import org.chromium.chrome.browser.ntp.NewTabPage;
 import org.chromium.chrome.browser.ntp.NewTabPage.FakeboxDelegate;
 import org.chromium.chrome.browser.ntp.NewTabPageUma;
 import org.chromium.chrome.browser.omnibox.AutocompleteController.OnSuggestionsReceivedListener;
 import org.chromium.chrome.browser.omnibox.OmniboxResultsAdapter.OmniboxResultItem;
 import org.chromium.chrome.browser.omnibox.OmniboxResultsAdapter.OmniboxSuggestionDelegate;
 import org.chromium.chrome.browser.omnibox.VoiceSuggestionProvider.VoiceResult;
@@ skipping 1055 matching lines @@
         }
 
         if (pastedText != null) {
             // This must be happen after requestUrlFocus(), which changes the selection.
             mUrlBar.setUrl(pastedText, null);
             mUrlBar.setSelection(mUrlBar.getText().length());
         }
     }
 
     @Override
+    public boolean isCurrentPage(NativePage nativePage) {
+        assert nativePage != null;
+        return nativePage == mToolbarDataProvider.getNewTabPageForCurrentTab();
+    }
+
+    @Override
     public void showUrlBarCursorWithoutFocusAnimations() {
         if (mUrlHasFocus || mUrlFocusedFromFakebox) return;
 
         mUrlFocusedWithoutAnimations = true;
         setUrlBarFocus(true);
     }
 
     /**
      * Sets the toolbar that owns this LocationBar.
      */
@@ skipping 1312 matching lines @@
     public View getContainerView() {
         return this;
     }
 
     @Override
     public void setTitleToPageTitle() { }
 
     @Override
     public void setShowTitle(boolean showTitle) { }
 }