Workaround for Samsung email issues

third_party/WebKit/Source/core/dom/Range.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Gunnstein Lye (gunnstein@netcom.no)
  * (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 25 matching lines @@
 #include "core/dom/ProcessingInstruction.h"
 #include "core/dom/Text.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/EphemeralRange.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/iterators/TextIterator.h"
 #include "core/editing/serializers/Serialization.h"
 #include "core/events/ScopedEventQueue.h"
+#include "core/frame/Settings.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutText.h"
 #include "core/svg/SVGSVGElement.h"
 #include "platform/EventDispatchForbiddenScope.h"
 #include "platform/geometry/FloatQuad.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/StringBuilder.h"
 #ifndef NDEBUG
@@ skipping 14 matching lines @@
     } else {
       DCHECK_EQ(s_range, range);
 #endif
     }
   }
 
   ~RangeUpdateScope() {
     DCHECK_GE(s_scopeCount, 1);
     if (--s_scopeCount > 0)
       return;
-    m_range->removeFromSelectionIfInDifferentRoot(*m_oldDocument);
-    m_range->updateSelectionIfAddedToSelection();
+    Settings* settings =
+        m_oldDocument->frame() ? m_oldDocument->frame()->settings() : nullptr;
+    if (!settings ||
+        !settings->getDoNotUpdateSelectionOnMutatingSelectionRange()) {
+      m_range->removeFromSelectionIfInDifferentRoot(*m_oldDocument);
+      m_range->updateSelectionIfAddedToSelection();
+    }
 #if DCHECK_IS_ON()
     s_range = nullptr;
 #endif
   }
 
  private:
   static int s_scopeCount;
 #if DCHECK_IS_ON()
   // This raw pointer is safe because
   //  - s_range has a valid pointer only if RangeUpdateScope instance is live.
@@ skipping 1735 matching lines @@
                      .data()
               << "start offset: " << range->startOffset()
               << ", end offset: " << range->endOffset();
   } else {
     LOG(INFO) << "Cannot show tree if range is null, or if boundary points are "
                  "invalid.";
   }
 }
 
 #endif