Rename DisplayList->RenderNode

Change-Id: Id42e23c9a1a6eb6eaeafef707ced7fa6887b03d0
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 83de772..8aac0fe 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1912,7 +1912,7 @@
 // Drawing
 ///////////////////////////////////////////////////////////////////////////////
 
-status_t OpenGLRenderer::drawDisplayList(DisplayList* displayList, Rect& dirty,
+status_t OpenGLRenderer::drawDisplayList(RenderNode* displayList, Rect& dirty,
         int32_t replayFlags) {
     status_t status;
     // All the usual checks and setup operations (quickReject, setupDraw, etc.)