Invalidate first line display item clients when first line style changes

third_party/WebKit/Source/core/layout/LayoutInline.cpp

Index: third_party/WebKit/Source/core/layout/LayoutInline.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutInline.cpp b/third_party/WebKit/Source/core/layout/LayoutInline.cpp
index 58f6568fd484ab97715f23e4fbfa2cdac89ef240..fd5bdf89a9bf80156e7d7c9b3a4a60388ac281c4 100644
--- a/third_party/WebKit/Source/core/layout/LayoutInline.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutInline.cpp
@@ -1424,4 +1424,24 @@ void LayoutInline::invalidateDisplayItemClients(const LayoutBoxModelObject& pain
         paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*box, invalidationReason, paintInvalidationRect);
 }
 
+void LayoutInline::invalidateDisplayItemClientsOfFirstLine()
+{
+    if (alwaysCreateLineBoxes()) {
+        for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox()) {
+            if (!box->isFirstLineStyle())
+                break;
+            box->invalidateDisplayItemClientsOfFirstLine();
+        }
+        return;
+    }
+
+    for (LayoutObject* child = firstChild(); child; child = child->nextSibling()) {
+        child->setShouldDoFullPaintInvalidation();
+        if (child->isLayoutInline())
+            toLayoutInline(child)->invalidateDisplayItemClientsOfFirstLine();
+        else if (child->isText())
+            toLayoutText(child)->invalidateDisplayItemClientsOfFirstLine();
+    }
+}
+
 } // namespace blink