Better performance for -LayoutUnit

third_party/WebKit/Source/platform/LayoutUnit.h

Index: third_party/WebKit/Source/platform/LayoutUnit.h
diff --git a/third_party/WebKit/Source/platform/LayoutUnit.h b/third_party/WebKit/Source/platform/LayoutUnit.h
index f8fd072314a06f65754c9f9277faa8a0d42a32cd..16677770cb0f7be5762cf5721fd9ef0027c4a294 100644
--- a/third_party/WebKit/Source/platform/LayoutUnit.h
+++ b/third_party/WebKit/Source/platform/LayoutUnit.h
@@ -644,12 +644,8 @@ inline float operator-(const float a, const LayoutUnit& b)
 
 inline LayoutUnit operator-(const LayoutUnit& a)
 {
-    // -min() is saturated to max().
-    if (a == LayoutUnit::min())
-        return LayoutUnit::max();
-
     LayoutUnit returnVal;
-    returnVal.setRawValue(-a.rawValue());
+    returnVal.setRawValue(saturatedNegative(a.rawValue()));
     return returnVal;
 }