Fix missed invalidation in markFixedPositionObjectForLayoutIfNeeded.

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

Index: third_party/WebKit/Source/core/layout/LayoutBlock.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
index 8d111bb57d37d7b494d39004698e14fae44abb4b..12300e2c4704453ddc633e1a2c85d952e7179925 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.cpp
@@ -698,7 +698,8 @@ void LayoutBlock::markFixedPositionObjectForLayoutIfNeeded(
     LayoutUnit newLeft = computedValues.m_position;
     if (newLeft != box->logicalLeft())
       layoutScope.setChildNeedsLayout(child);
-  } else if (hasStaticBlockPosition) {
+  }
+  if (hasStaticBlockPosition) {
     LogicalExtentComputedValues computedValues;
     box->computeLogicalHeight(computedValues);
     LayoutUnit newTop = computedValues.m_position;