Fix typo

.travis.yml

@@ -10,7 +10,7 @@ before_install:
   - "sudo apt-get install -y libappindicator1 fonts-liberation"
   - "wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb"
   - "sudo dpkg -i google-chrome*.deb"
-  - "export CHROME_BIN=/usr/bin.google-chrome"
+  - "export CHROME_BIN=/usr/bin/google-chrome"
 
 before_script:
   - npm install