Reland of Add StyleDifference::needsVisualRectUpdate

third_party/WebKit/Source/core/style/ComputedStyle.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index 12a1ffac605679b1800ce9203b106515813337db..a53868d5208a2a2d950d3bc3f2f1dc5cc91b81b5 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -556,6 +556,9 @@ StyleDifference ComputedStyle::visualInvalidationDiff(
   else if (diffNeedsPaintInvalidationObject(other))
     diff.setNeedsPaintInvalidationObject();
 
+  if (diffNeedsVisualRectUpdate(other))
+    diff.setNeedsVisualRectUpdate();
+
   updatePropertySpecificDifferences(other, diff);
 
   // The following condition needs to be at last, because it may depend on
@@ -997,6 +1000,21 @@ bool ComputedStyle::diffNeedsPaintInvalidationObjectForPaintImage(
   return false;
 }
 
+// This doesn't include conditions needing layout or overflow recomputation
+// which implies visual rect update.
+bool ComputedStyle::diffNeedsVisualRectUpdate(
+    const ComputedStyle& other) const {
+  // Visual rect is empty if visibility is hidden.
+  if (visibility() != other.visibility())
+    return true;
+
+  // Need to update visual rect of the resizer.
+  if (resize() != other.resize())
+    return true;
+
+  return false;
+}
+
 void ComputedStyle::updatePropertySpecificDifferences(
     const ComputedStyle& other,
     StyleDifference& diff) const {