Create a sub direcory for translate custom views.

chrome/android/java/res/layout/infobar_translate_compact_content.xml

Index: chrome/android/java/res/layout/infobar_translate_compact_content.xml
diff --git a/chrome/android/java/res/layout/infobar_translate_compact_content.xml b/chrome/android/java/res/layout/infobar_translate_compact_content.xml
new file mode 100644
index 0000000000000000000000000000000000000000..bdd7a75457b9c264066cb668b1b384f3ca3e1b4f
--- /dev/null
+++ b/chrome/android/java/res/layout/infobar_translate_compact_content.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2017 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. -->
+
+<!-- TODO(googleo): Add correct style based on spec and contentDescription. -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/translate_infobar_content"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:orientation="horizontal">
+
+    <org.chromium.chrome.browser.infobar.translate.TranslateTabLayout
+        android:id="@+id/translate_infobar_tabs"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        app:tabGravity="fill"
+        app:tabMode="scrollable" />
+
+    <ImageButton
+        android:id="@+id/translate_infobar_menu_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:contentDescription="@null"

[gone, 2017/03/23 18:11:25]

Add this:

android:background="?attr/selectableItemBackground"

Might make it so the button ripples when you long press.

+        android:src="@drawable/btn_menu" />
+</LinearLayout>