upgrade circle chrome to last stable version

circle.yml

@@ -5,8 +5,8 @@ machine:
 dependencies:
   pre:
     - google-chrome --version
-    - wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub7 | sudo apt-key add -
-    - sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/3 stable main" >> /etc/apt/sources.list.d/google.list'
+    - wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+    - sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
     - sudo apt-get update
     - sudo apt-get --only-upgrade install google-chrome-stable
     - google-chrome --version
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