title: How to keep crosswalk code when obfuscate my project?
body: <p>I import crosswalk in my app. To keep the crosswalk code, I add this in proguard-project.txt:</p>
  
  <pre><code>-dontwarn org.chromium.**
  -dontwarn org.xwalk.core.**
  
  -keep class com.google.common.** {*;}
  -keep class com.googlecode.eyesfree.braille.** {*;}
  -keep class javax.annotation.** {*;}
  -keep class org.chromium.** {*;}
  -keep class org.xwalk.core.** {*;}
  </code></pre>
  
  <p>But, it seems wrong. Who can help me? Thanks very much!</p>