Move adjustForUnsplittableChild() from RenderBlock to RenderBlockFlow.

Source/core/rendering/RenderBlockFlow.h

Index: Source/core/rendering/RenderBlockFlow.h
diff --git a/Source/core/rendering/RenderBlockFlow.h b/Source/core/rendering/RenderBlockFlow.h
index efb717e4eb8557ccaa97191122df8b487f3e2324..3e4cb22150e4c5bcdda5660932ae3c63f8ec7d51 100644
--- a/Source/core/rendering/RenderBlockFlow.h
+++ b/Source/core/rendering/RenderBlockFlow.h
@@ -441,7 +441,10 @@ private:
     LayoutUnit applyAfterBreak(RenderBox* child, LayoutUnit logicalOffset, MarginInfo&); // If the child has an after break, then return a new offset that shifts to the top of the next page/column.
 
     LayoutUnit adjustBlockChildForPagination(LayoutUnit logicalTopAfterClear, LayoutUnit estimateWithoutPagination, RenderBox* child, bool atBeforeSideOfBlock);
-    void adjustLinePositionForPagination(RootInlineBox*, LayoutUnit& deltaOffset, RenderFlowThread*); // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page.
+    // Computes a deltaOffset value that put a line at the top of the next page if it doesn't fit on the current page.
+    void adjustLinePositionForPagination(RootInlineBox*, LayoutUnit& deltaOffset, RenderFlowThread*);
+    // If the child is unsplittable and can't fit on the current page, return the top of the next page/column.
+    LayoutUnit adjustForUnsplittableChild(RenderBox*, LayoutUnit logicalOffset, bool includeMargins = false);

[rune, 2014/09/25 11:13:22]

Adjust what? I know you didn't invent this method name, but either the method
name or the logicalOffset argument should be named to make it clear this is a
vertical offset. logicalTopOffset, if that's what it is.

[mstensho (USE GERRIT), 2014/09/26 11:09:01]

adjustPositionForUnsplittableChild()?
adjustUnsplittableChildPosition()?
adjustUnsplittableChildPositionForPagination()?
adjustUnsplittableChildForPagination()?
adjustUnsplittableBlockChildForPagination()?

My last suggestion here harmonizes well with the already existing
adjustBlockChildForPagination() method, FWIW.

Could rename the parameter to logicalTop too.

 
     // Used to store state between styleWillChange and styleDidChange
     static bool s_canPropagateFloatIntoSibling;