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 5db2ae9ea987d0ab5a34cb6b64c75556c12c63d7..75b87e777e27e5d2de82e9aeb3e11dcc05751cd0 100644
--- a/Source/core/page/UseCounter.cpp
+++ b/Source/core/page/UseCounter.cpp
@@ -495,6 +495,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     case CSSPropertyObjectFit: return 433;
     case CSSPropertyPaintOrder: return 434;
     case CSSPropertyMaskSourceType: return 435;
+    case CSSPropertyObjectPosition: return 436;
 
     // Add new features above this line (don't change the assigned numbers of the existing
     // items) and update maximumCSSSampleId() with the new maximum value.
@@ -509,7 +510,7 @@ int UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(int id)
     return 0;
 }
 
-static int maximumCSSSampleId() { return 434; }
+static int maximumCSSSampleId() { return 436; }
 
 UseCounter::UseCounter()
 {