[NTP Snippets] Fill space below the last snippet if necessary

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.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.ntp;
 
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
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             // display. Never let the height be more than the |maxSnippetHeaderHeight|.
             headerHeight = Math.min(
                     amountScrolledIntoHeaderSpace / numberHeaderHeight, maxSnippetHeaderHeight);
 
             // Get the alpha for the snippet header.
             headerAlpha = (float) headerHeight / maxSnippetHeaderHeight;
         }
         snippetHeader.setAlpha(headerAlpha);
         params.height = headerHeight;
         snippetHeader.setLayoutParams(params);
+
+        // Update the space at the bottom, which needs to know about the height of the header.
+        mRecyclerView.refreshBottomSpacing();
     }
 
     /**
      * Sets up scrolling when snippets are enabled. It adds scroll listeners and touch listeners to
      * the RecyclerView.
      */
     private void initializeSearchBoxRecyclerViewScrollHandling() {
         final Runnable mSnapScrollRunnable = new Runnable() {
             @Override
             public void run() {
@@ skipping 653 matching lines @@
     }
 
     private int getVerticalScroll() {
         if (mUseCardsUi) {
             return mRecyclerView.computeVerticalScrollOffset();
         } else {
             return mScrollView.getScrollY();
         }
     }
 }