Remove explicit bounds check from CSSValueList::item

Source/core/css/CSSValueList.h

Index: Source/core/css/CSSValueList.h
diff --git a/Source/core/css/CSSValueList.h b/Source/core/css/CSSValueList.h
index 2d34b4f940694490a4d2566a0ec8e0bd7c9d520b..62d1db4fe4aecabcd532b75867b5722317c5cf8e 100644
--- a/Source/core/css/CSSValueList.h
+++ b/Source/core/css/CSSValueList.h
@@ -49,9 +49,9 @@ public:
     }
 
     size_t length() const { return m_values.size(); }
-    CSSValue* item(size_t index) { return index < m_values.size() ? m_values[index].get() : 0; }
-    const CSSValue* item(size_t index) const { return index < m_values.size() ? m_values[index].get() : 0; }
-    CSSValue* itemWithoutBoundsCheck(size_t index) { return m_values[index].get(); }
+    CSSValue* item(size_t index) { return m_values[index].get(); }
+    const CSSValue* item(size_t index) const { return m_values[index].get(); }
+    CSSValue* itemWithBoundsCheck(size_t index) { return index < m_values.size() ? m_values[index].get() : 0; }
 
     void append(PassRefPtrWillBeRawPtr<CSSValue> value) { m_values.append(value); }
     void prepend(PassRefPtrWillBeRawPtr<CSSValue> value) { m_values.prepend(value); }
@@ -88,7 +88,7 @@ class CSSValueListInspector {
     STACK_ALLOCATED();
 public:
     CSSValueListInspector(CSSValue* value) : m_list((value && value->isValueList()) ? toCSSValueList(value) : 0) { }
-    CSSValue* item(size_t index) const { ASSERT_WITH_SECURITY_IMPLICATION(index < length()); return m_list->itemWithoutBoundsCheck(index); }
+    CSSValue* item(size_t index) const { ASSERT_WITH_SECURITY_IMPLICATION(index < length()); return m_list->item(index); }
     CSSValue* first() const { return item(0); }
     CSSValue* second() const { return item(1); }
     size_t length() const { return m_list ? m_list->length() : 0; }