Use references in RenderBlock and RenderBlockFlow methods

Source/core/rendering/line/BreakingContextInlineHeaders.h

Index: Source/core/rendering/line/BreakingContextInlineHeaders.h
diff --git a/Source/core/rendering/line/BreakingContextInlineHeaders.h b/Source/core/rendering/line/BreakingContextInlineHeaders.h
index 2330f454c510859f4938d049ab8dc395d12591c7..7270a936a47cca3b4d51dbd02e87f6c2d1d5fde8 100644
--- a/Source/core/rendering/line/BreakingContextInlineHeaders.h
+++ b/Source/core/rendering/line/BreakingContextInlineHeaders.h
@@ -461,7 +461,7 @@ inline void BreakingContext::handleReplaced()
 
     // Optimize for a common case. If we can't find whitespace after the list
     // item, then this is all moot.
-    LayoutUnit replacedLogicalWidth = m_block->logicalWidthForChild(replacedBox) + m_block->marginStartForChild(replacedBox) + m_block->marginEndForChild(replacedBox) + inlineLogicalWidth(m_current.object());
+    LayoutUnit replacedLogicalWidth = m_block->logicalWidthForChild(*replacedBox) + m_block->marginStartForChild(*replacedBox) + m_block->marginEndForChild(*replacedBox) + inlineLogicalWidth(m_current.object());
     if (m_current.object()->isListMarker()) {
         if (m_blockStyle->collapseWhiteSpace() && shouldSkipWhitespaceAfterStartObject(m_block, m_current.object(), m_lineMidpointState)) {
             // Like with inline flows, we start ignoring spaces to make sure that any