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 885d9b88e0006ad823b63b46f061419362ed060a..6300512dd4923358e882bef13780da0eda810e12 100644
--- a/Source/core/page/UseCounter.cpp
+++ b/Source/core/page/UseCounter.cpp
@@ -494,6 +494,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     case CSSPropertyAnimationTimingFunction: return 432;
     case CSSPropertyObjectFit: return 433;
     case CSSPropertyPaintOrder: return 434;
+    case CSSPropertyObjectPosition: return 435;
 
     // Add new features above this line (don't change the assigned numbers of the existing
     // items) and update maximumCSSSampleId() with the new maximum value.
@@ -508,7 +509,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     return 0;
 }
 
-static int maximumCSSSampleId() { return 434; }
+static int maximumCSSSampleId() { return 435; }
 
 UseCounter::UseCounter()
 {