Invalidate first line display item clients when first line style changes

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

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
index 2769ce4aa7677d610b11012db7e306298b7010f8..51b59da4c81369c81662ec8fe4fa3284fa91531c 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
@@ -2065,4 +2065,21 @@ LayoutUnit LayoutBlockFlow::startAlignedOffsetForLine(LayoutUnit position, bool
     return logicalLeft;
 }
 
+static void invalidateDisplayItemClientsOfInlineBoxRecursively(LayoutBlockFlow* flow, InlineBox& box)
+{
+    flow->invalidateDisplayItemClient(box);
+    if (!box.isInlineFlowBox())
+        return;
+    for (InlineBox* curr = toInlineFlowBox(box).firstChild(); curr; curr = curr->nextOnLine())
+        invalidateDisplayItemClientsOfInlineBoxRecursively(flow, *curr);
+}
+
+void LayoutBlockFlow::invalidateDisplayItemClientsOfFirstLine()
+{
+    if (RootInlineBox* firstRootBox = this->firstRootBox())
+        invalidateDisplayItemClientsOfInlineBoxRecursively(this, *firstRootBox);
+    else if (firstChild()->isLayoutBlockFlow())
+        toLayoutBlockFlow(firstChild())->invalidateDisplayItemClientsOfFirstLine();
+}
+
 }