🍝🏠 Refactor MostVisited UI management, extract it for reuse in Home.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedLayout.java
index 9ec2ef691040d6a6d8d122ecb69bbc55f36c01c1..47c99aa95f4363766c8b92d5ba483e642927c156 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedLayout.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/MostVisitedLayout.java
@@ -6,6 +6,8 @@ package org.chromium.chrome.browser.ntp;
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.drawable.Drawable;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.FrameLayout;
@@ -66,6 +68,22 @@ public class MostVisitedLayout extends FrameLayout {
         forceLayout();
     }
 
+    /**
+     * Sets a new icon on the child view with a matching URL.
+     * @param url The site URL of the child tile view.
+     * @param icon The icon to set.
+     */
+    public void updateIconView(String url, Drawable icon) {
+        int childCount = getChildCount();
+        for (int i = 0; i < childCount; i++) {
+            MostVisitedItemView tileView = (MostVisitedItemView) getChildAt(i);
+            if (TextUtils.equals(url, tileView.getUrl())) {
+                tileView.setIcon(icon);
+                break;
+            }
+        }
+    }
+
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         int totalWidth = resolveSize(mMaxWidth, widthMeasureSpec);