Copying text closes the keyboard and the text input gets unfocused, forcing virtual keyboard is get…

Source/core/editing/FrameSelection.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 281 matching lines @@
         else
             alignment = (align == AlignCursorOnScrollAlways) ? ScrollAlignment::alignTopAlways : ScrollAlignment::alignToEdgeIfNeeded;
 
         revealSelection(alignment, RevealExtent);
     }
 
     notifyAccessibilityForSelectionChange();
     m_frame->domWindow()->enqueueDocumentEvent(Event::create(EventTypeNames::selectionchange));
 }
 
+bool FrameSelection::collapseToEnd()
+{
+    // Check for selection is editable and whether it's range selection or not.
+    if (!selection().rootEditableElement() || !isRange())
+        return false;
+
+    // Collapsing the selection to end of range selection.
+    moveTo(m_selection.end(), DOWNSTREAM);
+
+    return true;
+}
+
 static bool removingNodeRemovesPosition(Node& node, const Position& position)
 {
     if (!position.anchorNode())
         return false;
 
     if (position.anchorNode() == node)
         return true;
 
     if (!node.isElementNode())
         return false;
@@ skipping 1574 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const WebCore::FrameSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif