Add travis-ci support

install-build-deps.sh

 #!/bin/bash
 # Copyright 2014 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.
 
 # Installs required build dependencies (to buildtools/ and the local system).
 
-CHROME_MIN_VERSION=32
+CHROME_MIN_VERSION=49
 
 (
   set -e
   if [ "$(id -u)" != "0" ]; then
     echo "Please run this as root."
     exit 1
   fi
 
   apt-get update
-  apt-get install \
+  apt-get install -y \
     ant \
     openjdk-7-jdk \
     protobuf-compiler \
     python \
     python-setuptools \
     python-protobuf \
     unzip \
     wget \
     xvfb
 
   if ! command -v google-chrome >/dev/null 2>&1; then
     wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
-    echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list
+    echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list
     apt-get update
     apt-get install google-chrome-stable
   fi
 
   # Update chrome if it is too old, and keep the default channel.
   if ! google-chrome --version | tr " " "\n" | awk '/[0-9.]/{exit ($1<'${CHROME_MIN_VERSION}')}'; then
     case "$(google-chrome --version)" in
       *dev*)
         apt-get install google-chrome-unstable
         ;;
@@ skipping 26 matching lines @@
   chmod u+x $tools/chromedriver
 
   wget https://pypi.python.org/packages/source/s/selenium/$tar
   tar -xf $tar
   cd $pkg
 
   python setup.py install
 
   rm -rf $tmp
 )