BR styled clear is ignored while partially relayouting.

Source/core/layout/LayoutBlockFlowLine.cpp

Index: Source/core/layout/LayoutBlockFlowLine.cpp
diff --git a/Source/core/layout/LayoutBlockFlowLine.cpp b/Source/core/layout/LayoutBlockFlowLine.cpp
index 026dfc368696d0e63ac37a88526d786e8a397239..9f41cb93b991b9fbaeaf9c47c2ae2a38374d955d 100644
--- a/Source/core/layout/LayoutBlockFlowLine.cpp
+++ b/Source/core/layout/LayoutBlockFlowLine.cpp
@@ -745,6 +745,7 @@ void LayoutBlockFlow::layoutRunsAndFloats(LineLayoutState& layoutState)
     if (containsFloats())
         layoutState.setLastFloat(m_floatingObjects->set().last().get());
 
+

[leviw_travelin_and_unemployed, 2015/05/11 00:25:29]

Remove unnecessary empty line.

[changseok, 2015/05/11 15:56:46]

Done.

     // We also find the first clean line and extract these lines.  We will add them back
     // if we determine that we're able to synchronize after handling all our dirty lines.
     InlineIterator cleanLineStart;
@@ -1564,6 +1565,9 @@ void LayoutBlockFlow::layoutInlineChildren(bool relayoutChildren, LayoutUnit& pa
             if (!layoutState.hasInlineChild() && o->isInline())
                 layoutState.setHasInlineChild(true);
 
+            if (o->isBR() && (o->style()->clear() != CNONE))

[esprehn, 2015/05/10 18:23:35]

remove parens

[changseok, 2015/05/11 15:56:46]

Done.

+                layoutState.setContainsClearBR(true);
+
             if (o->isReplaced() || o->isFloating() || o->isOutOfFlowPositioned()) {
                 LayoutBox* box = toLayoutBox(o);
 
@@ -1857,7 +1861,7 @@ bool LayoutBlockFlow::checkPaginationAndFloatsAtEndLine(LineLayoutState& layoutS
 bool LayoutBlockFlow::matchedEndLine(LineLayoutState& layoutState, const InlineBidiResolver& resolver, const InlineIterator& endLineStart, const BidiStatus& endLineStatus)
 {
     if (resolver.position() == endLineStart) {
-        if (resolver.status() != endLineStatus)
+        if ((resolver.status() != endLineStatus) || (containsFloats() && layoutState.containsClearBR()))

[esprehn, 2015/05/10 18:23:35]

remove extra parens on the first expr.

[changseok, 2015/05/11 15:56:46]

Done.

             return false;
         return checkPaginationAndFloatsAtEndLine(layoutState);
     }