Add support for the object-position CSS property.

Source/core/page/UseCounter.cpp

Index: Source/core/page/UseCounter.cpp
diff --git a/Source/core/page/UseCounter.cpp b/Source/core/page/UseCounter.cpp
index 780f009f179f168667e958c8e8c2dbcf4a9c11a8..652e04e6f169d16a85f380c8a7e02b0c85f56b09 100644
--- a/Source/core/page/UseCounter.cpp
+++ b/Source/core/page/UseCounter.cpp
@@ -496,6 +496,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     case CSSPropertyPaintOrder: return 434;
     case CSSPropertyMaskSourceType: return 435;
     case CSSPropertyIsolation: return 436;
+    case CSSPropertyObjectPosition: return 437;
 
     // Add new features above this line (don't change the assigned numbers of the existing
     // items) and update maximumCSSSampleId() with the new maximum value.
@@ -510,7 +511,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     return 0;
 }
 
-static int maximumCSSSampleId() { return 434; }
+static int maximumCSSSampleId() { return 437; }
 
 UseCounter::UseCounter()
 {