Paste popup is positioning properly during content scroll.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 9733a58784af0c70ff24a72caa08e94a4c75e899..8c6c08bd5550de2c2772003b1a73bbbb11419111 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -292,6 +292,7 @@ public class ContentViewCore
     // Lazily created paste popup menu, triggered either via long press in an
     // editable region or from tapping the insertion handle.
     private PastePopupMenu mPastePopupMenu;
+    private boolean mWasPastePopupShowingOnInsertionDragStart;
 
     private PopupTouchHandleDrawableDelegate mTouchHandleDelegate;
 
@@ -2191,13 +2192,21 @@ public class ContentViewCore
                 mHasInsertion = true;
                 break;
 
-            case SelectionEventType.INSERTION_MOVED:
-                // TODO(jdduke): Handle case where movement triggered by focus.
+            case SelectionEventType.INSERTION_DRAG_STARTED:
+                mWasPastePopupShowingOnInsertionDragStart = getPastePopup().isShowing();
                 hidePastePopup();
                 break;
 
+            case SelectionEventType.INSERTION_MOVED:
+                if (getPastePopup().isShowing() && !isScrollInProgress()) {
+                    showPastePopup((int) posXDip, (int) posYDip);
+                } else {
+                    hidePastePopup();
+                }
+                break;
+
             case SelectionEventType.INSERTION_TAPPED:
-                if (getPastePopup().isShowing())
+                if (mWasPastePopupShowingOnInsertionDragStart)
                     mPastePopupMenu.hide();
                 else
                     showPastePopup((int) posXDip, (int) posYDip);
@@ -2205,6 +2214,7 @@ public class ContentViewCore
 
             case SelectionEventType.INSERTION_CLEARED:
                 mHasInsertion = false;
+                mWasPastePopupShowingOnInsertionDragStart = false;
                 hidePastePopup();
                 break;