title: How to find X11/extensions/XTest.h
body: <p>I am using ubuntu 10.10, and when i compile chromium, it said 
  <code>remoting/host/event_executor_linux.cc:9: fatal error: X11/extensions/XTest.h: No such file or directory</code></p>
  
  <p>But i have already installed libx11-dev:</p>
  
  <pre><code>$ sudo apt-get install  libx11-dev
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  libx11-dev is already the newest version.
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  </code></pre>
  
  <p>Please tell me how can I fix my problem.</p>
  
  <p>Thank you.</p>