Adding CustomAction to delete debug.log on uninstall

I noticed that we leave a crufty debug.log file in the directory
when our MSI is removed.  I added a custom action to clean it
up so we don't leave cruft on the system during upgrades or
uninstalls.

Change-Id: Ibbb13dcdcbc60dc95c3db4996d1243637354afe5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033625Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737478}

remoting/host/installer/win/chromoting.wxs

@@ -766,6 +766,13 @@
        Impersonate="no"
        Return="ignore"/>
 
+    <CustomAction Id="remove_debug_log"
+      Directory="binaries"
+      ExeCommand='cmd /c del /f debug.log'
+      Execute="deferred"
+      Impersonate="no"
+      Return="ignore"/>
+
     <InstallExecuteSequence>
       <!-- Set REINSTALL=all and REINSTALLMODE=amus if the user reruns the
            MSI, which will force reinstalling all files and services.  -->
@@ -793,6 +800,9 @@
            See http://msdn.microsoft.com/en-us/library/aa371197.aspx. -->
       <RemoveExistingProducts After="InstallInitialize" />
 
+      <Custom Action="remove_debug_log" Before="RemoveFiles">
+        Installed AND (NOT MAINTENANCE)
+      </Custom>
       <Custom Action="remove_symbolic_link" Before="RemoveFiles">
         Installed AND (NOT MAINTENANCE)
       </Custom>