Move adjustForUnsplittableChild() from RenderBlock to RenderBlockFlow.

Source/core/rendering/RenderBlockFlow.cpp

Index: Source/core/rendering/RenderBlockFlow.cpp
diff --git a/Source/core/rendering/RenderBlockFlow.cpp b/Source/core/rendering/RenderBlockFlow.cpp
index 84aff4e1773ccbdeee660f2284e8a6a517dd8001..3e64c68b404aa2bc1815235bb0a4bc2309f6ee53 100644
--- a/Source/core/rendering/RenderBlockFlow.cpp
+++ b/Source/core/rendering/RenderBlockFlow.cpp
@@ -867,6 +867,25 @@ void RenderBlockFlow::adjustLinePositionForPagination(RootInlineBox* lineBox, La
     }
 }
 
+LayoutUnit RenderBlockFlow::adjustForUnsplittableChild(RenderBox* child, LayoutUnit logicalOffset, bool includeMargins)
+{
+    bool checkColumnBreaks = view()->layoutState()->isPaginatingColumns() || flowThreadContainingBlock();
+    bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight();
+    bool isUnsplittable = child->isUnsplittableForPagination() || (checkColumnBreaks && child->style()->columnBreakInside() == PBAVOID)
+        || (checkPageBreaks && child->style()->pageBreakInside() == PBAVOID);
+    if (!isUnsplittable)
+        return logicalOffset;
+    LayoutUnit childLogicalHeight = logicalHeightForChild(child) + (includeMargins ? marginBeforeForChild(child) + marginAfterForChild(child) : LayoutUnit());
+    LayoutUnit pageLogicalHeight = pageLogicalHeightForOffset(logicalOffset);
+    updateMinimumPageHeight(logicalOffset, childLogicalHeight);
+    if (!pageLogicalHeight || childLogicalHeight > pageLogicalHeight)
+        return logicalOffset;
+    LayoutUnit remainingLogicalHeight = pageRemainingLogicalHeightForOffset(logicalOffset, ExcludePageBoundary);
+    if (remainingLogicalHeight < childLogicalHeight)
+        return logicalOffset + remainingLogicalHeight;
+    return logicalOffset;
+}
+
 void RenderBlockFlow::rebuildFloatsFromIntruding()
 {
     if (m_floatingObjects)