Revert "Avoid re-rendering stencil clip for every draw with reducable clip stack"

src/gpu/GrClipMaskCache.h

Index: src/gpu/GrClipMaskCache.h
diff --git a/src/gpu/GrClipMaskCache.h b/src/gpu/GrClipMaskCache.h
index 213e2823e37182648b35d259dd3a6fbb2738c891..97b4b515cc9b72b40161f3af5d9aa470b9468604 100644
--- a/src/gpu/GrClipMaskCache.h
+++ b/src/gpu/GrClipMaskCache.h
@@ -36,6 +36,10 @@ public:
         SkASSERT(clipGenID != SkClipStack::kWideOpenGenID);
         SkASSERT(clipGenID != SkClipStack::kEmptyGenID);
 
+        if (SkClipStack::kInvalidGenID == clipGenID) {
+            return false;
+        }
+
         GrClipStackFrame* back = (GrClipStackFrame*) fStack.back();
 
         // We could reuse the mask if bounds is a subset of last bounds. We'd have to communicate