diff -r 000000000000 -r 6474c204b198 mobile/android/base/widget/AnimatedHeightLayout.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/widget/AnimatedHeightLayout.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.widget;
+
+import org.mozilla.gecko.animation.HeightChangeAnimation;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.animation.Animation;
+import android.view.animation.DecelerateInterpolator;
+import android.widget.RelativeLayout;
+
+public class AnimatedHeightLayout extends RelativeLayout {
+    private static final String LOGTAG = "GeckoAnimatedHeightLayout";
+    private static final int ANIMATION_DURATION = 100;
+    private boolean mAnimating = false;
+
+    public AnimatedHeightLayout(Context context) {
+        super(context, null);
+    }
+
+    public AnimatedHeightLayout(Context context, AttributeSet attrs) {
+        super(context, attrs, 0);
+    }
+
+    public AnimatedHeightLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int oldHeight = getMeasuredHeight();
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        int newHeight = getMeasuredHeight();
+
+        if (!mAnimating && oldHeight != 0 && oldHeight != newHeight) {
+            mAnimating = true;
+            setMeasuredDimension(getMeasuredWidth(), oldHeight);
+
+            // Animate the difference of suggestion row height
+            Animation anim = new HeightChangeAnimation(this, oldHeight, newHeight);
+            anim.setDuration(ANIMATION_DURATION);
+            anim.setInterpolator(new DecelerateInterpolator());
+            anim.setAnimationListener(new Animation.AnimationListener() {
+                @Override
+                public void onAnimationStart(Animation animation) {}
+                @Override
+                public void onAnimationRepeat(Animation animation) {}
+                @Override
+                public void onAnimationEnd(Animation animation) {
+                    post(new Runnable() {
+                        @Override
+                        public void run() {
+                            finishAnimation();
+                        }
+                    });
+                }
+            });
+            startAnimation(anim);
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        finishAnimation();
+    }
+
+    private void finishAnimation() {
+        if (mAnimating) {
+            getLayoutParams().height = LayoutParams.WRAP_CONTENT;
+            mAnimating = false;
+        }
+    }
+}