shill: A couple of naming cleanups

Rename shill_event.* -> event_dispatcher.*.  This is more
consistent with correct style.  Also rename IOInputHandler ->
InputHandler.

BUG=None
TEST=Rerun unit tests

Change-Id: I13d56b857c85b32ba1418e894de68afc5a23f00d
Reviewed-on: http://gerrit.chromium.org/gerrit/10326
Reviewed-by: mukesh agrawal <quiche@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>
diff --git a/device.h b/device.h
index 85ad698..5a62449 100644
--- a/device.h
+++ b/device.h
@@ -13,11 +13,11 @@
 #include <base/memory/scoped_ptr.h>
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST
 
+#include "shill/event_dispatcher.h"
 #include "shill/ipconfig.h"
 #include "shill/property_store.h"
 #include "shill/refptr_types.h"
 #include "shill/service.h"
-#include "shill/shill_event.h"
 #include "shill/technology.h"
 
 namespace shill {