Implement setter/getter for PaintInfo::outlineObjects.

Source/core/rendering/InlineFlowBox.cpp

Index: Source/core/rendering/InlineFlowBox.cpp
diff --git a/Source/core/rendering/InlineFlowBox.cpp b/Source/core/rendering/InlineFlowBox.cpp
index e9890ff8ddb52976b7ed173ce555d5e3630272db..dc5059527b1340c76e6e80a9f273a02f8f49a232 100644
--- a/Source/core/rendering/InlineFlowBox.cpp
+++ b/Source/core/rendering/InlineFlowBox.cpp
@@ -1105,8 +1105,9 @@ void InlineFlowBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset,
                     // Add ourselves to the containing block of the entire continuation so that it can
                     // paint us atomically.
                     cb->addContinuationWithOutline(toRenderInline(renderer()->node()->renderer()));
-                } else if (!inlineFlow->isInlineElementContinuation())
-                    paintInfo.outlineObjects->add(inlineFlow);
+                } else if (!inlineFlow->isInlineElementContinuation()) {
+                    paintInfo.outlineObjects()->add(inlineFlow);
+                }
             }
         } else if (paintInfo.phase == PaintPhaseMask) {
             paintMask(paintInfo, paintOffset);