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

Source/modules/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
@@ skipping 396 matching lines @@
 class MODULES_EXPORT AXObject : public RefCountedWillBeGarbageCollectedFinalized<AXObject> {
 public:
     typedef WillBeHeapVector<RefPtrWillBeMember<AXObject>> AccessibilityChildrenVector;
 
     struct AXRange {
         // The deepest descendant in which the range starts.
         // (nullptr means the current object.)
         RefPtrWillBePersistent<AXObject> anchorObject;
         // The number of characters and child objects in the anchor object
         // before the range starts.
-        int anchorOffset;
+        unsigned anchorOffset;
         // The deepest descendant in which the range ends.
         // (nullptr means the current object.)
         RefPtrWillBePersistent<AXObject> focusObject;
         // The number of characters and child objects in the focus object
         // before the range ends.
-        int focusOffset;
+        unsigned focusOffset;
 
         AXRange()
             : anchorObject(nullptr)
-            , anchorOffset(-1)
+            , anchorOffset(UINT_MAX)
             , focusObject(nullptr)
-            , focusOffset(-1)
+            , focusOffset(UINT_MAX)
         { }
 
-        AXRange(int startOffset, int endOffset)
+        AXRange(unsigned startOffset, unsigned endOffset)
             : anchorObject(nullptr)
             , anchorOffset(startOffset)
             , focusObject(nullptr)
             , focusOffset(endOffset)
         { }
 
-        AXRange(PassRefPtrWillBeRawPtr<AXObject> anchorObject, int anchorOffset,
-            PassRefPtrWillBeRawPtr<AXObject> focusObject, int focusOffset)
+        AXRange(PassRefPtrWillBeRawPtr<AXObject> anchorObject, unsigned anchorOffset,
+            PassRefPtrWillBeRawPtr<AXObject> focusObject, unsigned focusOffset)
             : anchorObject(anchorObject)
             , anchorOffset(anchorOffset)
             , focusObject(focusObject)
             , focusOffset(focusOffset)
         { }
 
         bool isValid() const
         {
             return ((anchorObject && focusObject)
-                || (!anchorObject && !focusObject))
-                && anchorOffset >= 0 && focusOffset >= 0;
+                || (!anchorObject && !focusObject));
         }
 
         // Determines if the range only refers to text offsets under the current object.
         bool isSimple() const
         {
             return anchorObject == focusObject || !anchorObject || !focusObject;
         }
     };
 
 protected:
@@ skipping 439 matching lines @@
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, object.predicate)
 
 } // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::IgnoredReason);
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::NameSource);
 
 #endif // AXObject_h