diff --git a/core/java/android/webkit/WebBackForwardList.java b/core/java/android/webkit/WebBackForwardList.java
index 0c34e3c16ac6b..4d3bbe475920b 100644
--- a/core/java/android/webkit/WebBackForwardList.java
+++ b/core/java/android/webkit/WebBackForwardList.java
@@ -57,7 +57,8 @@ public abstract class WebBackForwardList implements Cloneable, Serializable {
     /**
      * Clone the entire object to be used in the UI thread by clients of
      * WebView. This creates a copy that should never be modified by any of the
-     * webkit package classes.
+     * webkit package classes. On Android 4.4 and later there is no need to use
+     * this, as the object is already a read-only copy of the internal state.
      */
     protected abstract WebBackForwardList clone();
 }
diff --git a/core/java/android/webkit/WebHistoryItem.java b/core/java/android/webkit/WebHistoryItem.java
index 74db039e015d7..b9e704285f841 100644
--- a/core/java/android/webkit/WebHistoryItem.java
+++ b/core/java/android/webkit/WebHistoryItem.java
@@ -23,7 +23,7 @@ import android.graphics.Bitmap;
 /**
  * A convenience class for accessing fields in an entry in the back/forward list
  * of a WebView. Each WebHistoryItem is a snapshot of the requested history
- * item. Each history item may be updated during the load of a page.
+ * item.
  * @see WebBackForwardList
  */
 public abstract class WebHistoryItem implements Cloneable {
@@ -44,8 +44,6 @@ public abstract class WebHistoryItem implements Cloneable {
      * history item. See getTargetUrl() for the url that is the actual target of
      * this history item.
      * @return The base url of this history item.
-     * Note: The VM ensures 32-bit atomic read/write operations so we don't have
-     * to synchronize this method.
      */
     public abstract String getUrl();
 
@@ -60,22 +58,20 @@ public abstract class WebHistoryItem implements Cloneable {
     /**
      * Return the document title of this history item.
      * @return The document title of this history item.
-     * Note: The VM ensures 32-bit atomic read/write operations so we don't have
-     * to synchronize this method.
      */
     public abstract String getTitle();
 
     /**
      * Return the favicon of this history item or {@code null} if no favicon was found.
      * @return A Bitmap containing the favicon for this history item or {@code null}.
-     * Note: The VM ensures 32-bit atomic read/write operations so we don't have
-     * to synchronize this method.
      */
     @Nullable
     public abstract Bitmap getFavicon();
 
     /**
-     * Clone the history item for use by clients of WebView.
+     * Clone the history item for use by clients of WebView. On Android 4.4 and later
+     * there is no need to use this, as the object is already a read-only copy of the
+     * internal state.
      */
     protected abstract WebHistoryItem clone();
 }