Stop leaking temp directories in SkyShell

sky/shell/android/org/domokit/sky/shell/SkyApplication.java

Index: sky/shell/android/org/domokit/sky/shell/SkyApplication.java
diff --git a/sky/shell/android/org/domokit/sky/shell/SkyApplication.java b/sky/shell/android/org/domokit/sky/shell/SkyApplication.java
index eabb6608a4abe246de933371083aeac9ef9ce70c..8823440ffdee8e2c59c21d169d50becf6229b10f 100644
--- a/sky/shell/android/org/domokit/sky/shell/SkyApplication.java
+++ b/sky/shell/android/org/domokit/sky/shell/SkyApplication.java
@@ -68,7 +68,9 @@ public class SkyApplication extends BaseChromiumApplication {
     }
 
     private void initResources() {
-        mResourceExtractor = new ResourceExtractor(getApplicationContext());
+        Context context = getApplicationContext();
+        new ResourceCleaner(context).start();
+        mResourceExtractor = new ResourceExtractor(context);
         onBeforeResourceExtraction(mResourceExtractor);
         mResourceExtractor.start();
     }