The start and end arguments should be unsigned long in setSelectionRange() function

Source/modules/accessibility/AXLayoutObject.cpp

 /*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 1936 matching lines @@
     if (!layout)
         return AXRange();
 
     AXObject* axObject = axObjectCache().getOrCreate(layout);
     if (!axObject || !axObject->isAXLayoutObject())
         return AXRange();
 
     HTMLTextFormControlElement* textControl = toLayoutTextControl(
         layout)->textFormControlElement();
     ASSERT(textControl);
-    int start = textControl->selectionStart();
-    int end = textControl->selectionEnd();
+    unsigned start = textControl->selectionStart();
+    unsigned end = textControl->selectionEnd();
     return AXRange(axObject, start, axObject, end);
 }
 
 int AXLayoutObject::indexForVisiblePosition(const VisiblePosition& position) const
 {
     if (layoutObject() && layoutObject()->isTextControl()) {
         HTMLTextFormControlElement* textControl = toLayoutTextControl(
             layoutObject())->textFormControlElement();
         return textControl->indexForVisiblePosition(position);
     }
@@ skipping 662 matching lines @@
         if (label && label->layoutObject()) {
             LayoutRect labelRect = axObjectCache().getOrCreate(label)->elementRect();
             result.unite(labelRect);
         }
     }
 
     return result;
 }
 
 } // namespace blink