Fixed the insertion handle showing issue on readonly element.

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 2f8857816be0057ec75099785181429d7c083b8b..8db439536716e4b0b00904275973e3b3a2b8e52d 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
@@ -1909,6 +1909,14 @@ public class ContentViewCore
         return mHasSelection;
     }
 
+     /**
+     * @return Whether the page has an active, touch-controlled insertion handle.
+     */
+    @VisibleForTesting
+    protected boolean hasInsertion() {
+        return mHasInsertion;
+    }
+
     private void hidePastePopup() {
         if (mPastePopupMenu == null) return;
         mPastePopupMenu.hide();