Paste popup is positioning properly during content scroll.

content/public/android/java/src/org/chromium/content/browser/input/PastePopupMenu.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser.input;
 
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.TypedValue;
 import android.view.Gravity;
@@ skipping 153 matching lines @@
                 coords[0] += handleHalfWidth + width / 2;
             } else {
                 coords[0] -= handleHalfWidth + width / 2;
             }
         } else {
             // Horizontal clipping
             coords[0] = Math.max(0, coords[0]);
             coords[0] = Math.min(screenWidth - width, coords[0]);
         }
 
-        mContainer.showAtLocation(mParent, Gravity.NO_GRAVITY, coords[0], coords[1]);
+        if (!isShowing()) {
+            mContainer.showAtLocation(mParent, Gravity.NO_GRAVITY, coords[0], coords[1]);
+        } else {
+            mContainer.update(coords[0], coords[1], -1, -1);
+        }
     }
 
     private int viewIndex(boolean onTop) {
         return (onTop ? 0 : 1 << 1) + (canPaste() ? 0 : 1 << 0);
     }
 
     private void updateContent(boolean onTop) {
         final int viewIndex = viewIndex(onTop);
         View view = mPasteViews[viewIndex];
 
@@ skipping 23 matching lines @@
     }
 
     private boolean canPaste() {
         return mDelegate.canPaste();
     }
 
     private void paste() {
         mDelegate.paste();
     }
 }