Don't squash layers that have filters.

Source/platform/graphics/CompositingReasons.cpp

Index: Source/platform/graphics/CompositingReasons.cpp
diff --git a/Source/platform/graphics/CompositingReasons.cpp b/Source/platform/graphics/CompositingReasons.cpp
index 48725ab797f855f8c861d63b90e9609dd2f3796d..f20e85d6945d7d9cbe1c90d69e53616065e936a5 100644
--- a/Source/platform/graphics/CompositingReasons.cpp
+++ b/Source/platform/graphics/CompositingReasons.cpp
@@ -79,9 +79,9 @@ const CompositingReasonStringMap kCompositingReasonStringMap[] = {
     { CompositingReasonSquashingTransformAncestorMismatch,
         "squashingTransformAncestorMismatch",
         "Cannot be squashed because this layer has a different transform ancestor than the squashing layer" },
-    { CompositingReasonSquashingFilterAncestorMismatch,
+    { CompositingReasonSquashingFilterMismatch,
         "squashingFilterAncestorMismatch",
-        "Cannot be squashed because this layer has a different filter ancestor than the squashing layer" },
+        "Cannot be squashed because this layer has a different filter ancestor than the squashing layer, or this layer has a filter" },
     { CompositingReasonSquashingWouldBreakPaintOrder,
         "squashingWouldBreakPaintOrder",
         "Cannot be squashed without breaking paint order" },