Composite sticky-positioned elements when they have composited descendants

third_party/WebKit/Source/platform/graphics/CompositingReasons.h

Index: third_party/WebKit/Source/platform/graphics/CompositingReasons.h
diff --git a/third_party/WebKit/Source/platform/graphics/CompositingReasons.h b/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
index 6bb667daa2d98974bc28fb8e50442ff6a52f8429..b13ec36751af357b7a6febb95ce5fe8a8f17a494 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
+++ b/third_party/WebKit/Source/platform/graphics/CompositingReasons.h
@@ -61,7 +61,7 @@ const uint64_t CompositingReasonReflectionOfCompositedParent = UINT64_C(1)
                                                                << 28;
 const uint64_t CompositingReasonIsolateCompositedDescendants = UINT64_C(1)
                                                                << 29;
-const uint64_t CompositingReasonPositionFixedWithCompositedDescendants =
+const uint64_t CompositingReasonPositionFixedOrStickyWithCompositedDescendants =
     UINT64_C(1) << 30;
 
 // The root layer is a special case. It may be forced to be a layer, but it also
@@ -127,7 +127,7 @@ const uint64_t CompositingReasonComboCompositedDescendants =
     CompositingReasonBlendingWithCompositedDescendants |
     CompositingReasonReflectionWithCompositedDescendants |
     CompositingReasonClipsCompositingDescendants |
-    CompositingReasonPositionFixedWithCompositedDescendants;
+    CompositingReasonPositionFixedOrStickyWithCompositedDescendants;
 
 const uint64_t CompositingReasonCombo3DDescendants =
     CompositingReasonPreserve3DWith3DDescendants |
@@ -153,7 +153,7 @@ const uint64_t CompositingReasonComboReasonsThatRequireOwnBacking =
                                                     // that 3d-transformed
                                                     // elements intersect.
     CompositingReasonBackdropFilter |
-    CompositingReasonPositionFixedWithCompositedDescendants;
+    CompositingReasonPositionFixedOrStickyWithCompositedDescendants;
 
 const uint64_t CompositingReasonComboSquashableReasons =
     CompositingReasonOverlap | CompositingReasonAssumedOverlap |