Fix contants; RT-enable WebView pt2

 Bug: 15838537

 * Fix kSync_UIRedrawRequired constant value (woops)
 * Tell CanvasContext that WebView is now rt-safe

Change-Id: Idf15cf21115c2ca24b8ccd00025e8502864cd87c
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index fe4edf8..281a8e1 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -148,9 +148,7 @@
     info.out.canDrawThisFrame = !runningBehind;
 
     if (info.out.hasAnimations || !info.out.canDrawThisFrame) {
-        if (info.out.hasFunctors) {
-            info.out.requiresUiRedraw = true;
-        } else if (!info.out.requiresUiRedraw) {
+        if (!info.out.requiresUiRedraw) {
             // If animationsNeedsRedraw is set don't bother posting for an RT anim
             // as we will just end up fighting the UI thread.
             mRenderThread.postFrameCallback(this);