am d7439f4b: Use computeVerticalScrollRange() to find the bottom of the page as mContentHeight is not in the view system.

Merge commit 'd7439f4bdb31d005011b69112e82a9fed9be4470' into eclair-mr2

* commit 'd7439f4bdb31d005011b69112e82a9fed9be4470':
  Use computeVerticalScrollRange() to find the bottom

core/java/android/webkit/WebView.java

@@ -1537,7 +1537,7 @@ public class WebView extends AbsoluteLayout
         }
         nativeClearCursor(); // start next trackball movement from page edge
         if (bottom) {
-            return pinScrollTo(mScrollX, mContentHeight, true, 0);
+            return pinScrollTo(mScrollX, computeVerticalScrollRange(), true, 0);
         }
         // Page down.
         int h = getHeight();