Revert "Frameworks/base: Unused parameters in hwui"

This reverts commit 42ddc18d108f789705ad4eb697ce9599ad322507.

Change-Id: I3574a936a39a96314db6437d0a1eb58d260d893d
diff --git a/libs/hwui/AnimationContext.cpp b/libs/hwui/AnimationContext.cpp
index d2152ca..a20bdae 100644
--- a/libs/hwui/AnimationContext.cpp
+++ b/libs/hwui/AnimationContext.cpp
@@ -54,7 +54,7 @@
     handle->insertAfter(&mNextFrameAnimations);
 }
 
-void AnimationContext::startFrame(TreeInfo::TraversalMode /* mode */) {
+void AnimationContext::startFrame(TreeInfo::TraversalMode mode) {
     LOG_ALWAYS_FATAL_IF(mCurrentFrameAnimations.mNextHandle,
             "Missed running animations last frame!");
     AnimationHandle* head = mNextFrameAnimations.mNextHandle;