Revert "resolved conflicts for merge of 220c3f4f to master"

Reverted as hwui doesn't agree.

This reverts commit 8a902d9f24e83c87b054adb5836b4a5b8a257be9.

Change-Id: I109e7b02bee2921e2155ded6df36f52e6f574b5a
diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index 6983e2b..f887103 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -171,7 +171,7 @@
     mRenderState = new RenderState(*this);
 }
 
-int RenderThread::displayEventReceiverCallback(int /* fd */, int events, void* data) {
+int RenderThread::displayEventReceiverCallback(int fd, int events, void* data) {
     if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
         ALOGE("Display event receiver pipe was closed or an error occurred.  "
                 "events=0x%x", events);