[WebView] Hide PopupWindow-based selection handles on 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 0eb8db8c007b3e9470370df2f8e2e163ba9f201e..ce49534f04714f08b3015d23b5dd8324b5a51ab2 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
@@ -2187,6 +2187,11 @@ public class ContentViewCore
                     final boolean isTouchHandleEvent = true;
                     return onTouchEventImpl(event, isTouchHandleEvent);
                 }
+
+                @Override
+                public boolean isScrollInProgress() {
+                    return ContentViewCore.this.isScrollInProgress();
+                }
             };
         }
         return new PopupTouchHandleDrawable(mTouchHandleDelegate);