📰 Adjust the card display depending on the screen width.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
index 7f075a2fd6b92a5d07db0426c9411a8f1f30391e..b78ef0b6ef2b28e15cafab4c4e04b14a943341af 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPageView.java
@@ -6,6 +6,7 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
+import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -96,6 +97,7 @@
     private OnSearchBoxScrollListener mSearchBoxScrollListener;
 
     private NewTabPageManager mManager;
+    private UiConfig mUiConfig;
     private MostVisitedDesign mMostVisitedDesign;
     private MostVisitedItem[] mMostVisitedItems;
     private boolean mFirstShow = true;
@@ -255,6 +257,7 @@ public NewTabPageView(Context context, AttributeSet attrs) {
     public void initialize(NewTabPageManager manager, boolean searchProviderHasLogo,
             SnippetsBridge snippetsBridge) {
         mManager = manager;
+        mUiConfig = new UiConfig(this);
         ViewStub stub = (ViewStub) findViewById(R.id.new_tab_page_layout_stub);
 
         mUseCardsUi = snippetsBridge != null;
@@ -305,7 +308,8 @@ public void initialize(NewTabPageManager manager, boolean searchProviderHasLogo,
 
         // Set up snippets
         if (mUseCardsUi) {
-            mNewTabPageAdapter = new NewTabPageAdapter(mManager, mNewTabPageLayout, snippetsBridge);
+            mNewTabPageAdapter =
+                    new NewTabPageAdapter(mManager, mNewTabPageLayout, snippetsBridge, mUiConfig);
             mRecyclerView.setAdapter(mNewTabPageAdapter);
 
             // Set up swipe-to-dismiss
@@ -1102,6 +1106,18 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         }
     }
 
+    @Override
+    protected void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+
+        // When the viewport configuration changes, we want to update the display style so that the
+        // observers are aware of the new available space. Another moment to do this update could
+        // be through a OnLayoutChangeListener, but then we get notified of the change after the
+        // layout pass, which means that the new style will only be visible after layout happens
+        // again. We prefer updating here to avoid having to require that additional layout pass.
+        mUiConfig.updateDisplayStyle();
+    }
+
     private int getVerticalScroll() {
         if (mUseCardsUi) {
             return mRecyclerView.computeVerticalScrollOffset();