Revert of Fix dependencies for EventInterfaces.in (https://codereview.chromium.org/209723002/)

Reason for revert:
This has broken android_aosp compilation.

http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/58228

Original issue's description:
> Fix dependencies for EventInterfaces.in
> 
> EventInterfaces.in should depend on event IDL files.
> It currently doesn't, which means it fails to rebuild correctly.
> This fixes it.
> 
> TBR=haraken
> BUG=341748
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169998

TBR=haraken@chromium.org,acolwell@chromium.org,nbarth@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=341748

Review URL: https://codereview.chromium.org/212713002

git-svn-id: svn://svn.chromium.org/blink/trunk@170044 bbb929c8-8fbe-4397-9dbb-9b2b20218538