Stop searching for overhanging floats when the sibling's floats no longer overlap

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
index 704032fc14ec9a184f2913326d953e565e774172..8177bdd858125c547769a4ca26c915e38b5e97f6 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
@@ -1809,6 +1809,8 @@ LayoutUnit LayoutBlockFlow::collapseMargins(LayoutBox& child,
                        previousBlockFlow->lowestFloatLogicalBottom();
     if (lowestFloat > logicalTop)
       addOverhangingFloats(previousBlockFlow, false);
+    else
+      break;
     LayoutObject* prev = previousBlockFlow->previousSibling();
     if (prev && prev->isLayoutBlockFlow())
       previousBlockFlow = toLayoutBlockFlow(prev);