Merge patch for stacked floats with shape-outside from WebKit

Source/core/rendering/RenderBlock.h

Index: Source/core/rendering/RenderBlock.h
diff --git a/Source/core/rendering/RenderBlock.h b/Source/core/rendering/RenderBlock.h
index a632c62f42ee12b157038c072086080b9317669a..011c4bae1e2fec5017ffe34399a53d7aeea6fb0d 100644
--- a/Source/core/rendering/RenderBlock.h
+++ b/Source/core/rendering/RenderBlock.h
@@ -66,6 +66,7 @@ typedef Vector<WordMeasurement, 64> WordMeasurements;
 
 enum CaretType { CursorCaret, DragCaret };
 enum ContainingBlockState { NewContainingBlock, SameContainingBlock };
+enum ShapeOutsideFloatOffsetMode { ShapeOutsideFloatShapeOffset, ShapeOutsideFloatBoundingBoxOffset };
 
 enum TextRunFlag {
     DefaultTextRunFlags = 0,
@@ -506,8 +507,22 @@ protected:
     virtual void paintChildren(PaintInfo& forSelf, const LayoutPoint&, PaintInfo& forChild, bool usePrintRect);
     bool paintChild(RenderBox*, PaintInfo& forSelf, const LayoutPoint&, PaintInfo& forChild, bool usePrintRect);
    
-    LayoutUnit logicalRightOffsetForLine(LayoutUnit position, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* logicalHeightRemaining = 0, LayoutUnit logicalHeight = 0) const;
-    LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* logicalHeightRemaining = 0, LayoutUnit logicalHeight = 0) const;
+    LayoutUnit logicalRightOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const
+    {
+        return logicalRightOffsetForLineWithoutFloats(logicalRightFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatShapeOffset), applyTextIndent);
+    }
+    LayoutUnit logicalLeftOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const
+    {
+        return logicalLeftOffsetForLineWithoutFloats(logicalLeftFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatShapeOffset), applyTextIndent);
+    }
+    LayoutUnit logicalRightOffsetForLineUsingFloatBoundingBox(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const
+    {
+        return logicalRightOffsetForLineWithoutFloats(logicalRightFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatBoundingBoxOffset), applyTextIndent);
+    }
+    LayoutUnit logicalLeftOffsetForLineUsingFloatBoundingBox(LayoutUnit logicalTop, LayoutUnit fixedOffset, bool applyTextIndent, LayoutUnit* heightRemaining = 0, LayoutUnit logicalHeight = 0) const
+    {
+        return logicalLeftOffsetForLineWithoutFloats(logicalLeftFloatOffsetForLine(logicalTop, fixedOffset, heightRemaining, logicalHeight, ShapeOutsideFloatBoundingBoxOffset), applyTextIndent);
+    }
 
     virtual ETextAlign textAlignmentForLine(bool endsWithSoftBreak) const;
     virtual void adjustInlineDirectionLineBounds(int /* expansionOpportunityCount */, float& /* logicalLeft */, float& /* logicalWidth */) const { }
@@ -574,6 +589,11 @@ protected:
     virtual void checkForPaginationLogicalHeightChange(LayoutUnit& pageLogicalHeight, bool& pageLogicalHeightChanged, bool& hasSpecifiedPageLogicalHeight);
 
 private:
+    LayoutUnit logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining, LayoutUnit logicalHeight, ShapeOutsideFloatOffsetMode) const;
+    LayoutUnit logicalLeftFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit* heightRemaining, LayoutUnit logicalHeight, ShapeOutsideFloatOffsetMode) const;
+    LayoutUnit logicalRightOffsetForLineWithoutFloats(LayoutUnit fixedOffset, bool applyTextIndent) const;
+    LayoutUnit logicalLeftOffsetForLineWithoutFloats(LayoutUnit fixedOffset, bool applyTextIndent) const;
+
     void computeExclusionShapeSize();
     void updateExclusionShapeInsideInfoAfterStyleChange(const ExclusionShapeValue*, const ExclusionShapeValue* oldExclusionShape);