Get rid of a redundant argument DOWNSTREAM from PositionWithAffinity constructor call sites

Source/core/editing/VisiblePosition.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Portions Copyright (c) 2011 Motorola Mobility, 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
@@ skipping 76 matching lines @@
     if (pos.atStartOfTree())
         return VisiblePosition();
 
     VisiblePosition prev = VisiblePosition(pos, DOWNSTREAM);
     ASSERT(prev.deepEquivalent() != m_deepPosition);
 
 #if ENABLE(ASSERT)
     // we should always be able to make the affinity DOWNSTREAM, because going previous from an
     // UPSTREAM position can never yield another UPSTREAM position (unless line wrap length is 0!).
     if (prev.isNotNull() && m_affinity == UPSTREAM) {
-        ASSERT(inSameLine(PositionWithAffinity(prev.deepEquivalent(), DOWNSTREAM), PositionWithAffinity(prev.deepEquivalent(), UPSTREAM)));
+        ASSERT(inSameLine(PositionWithAffinity(prev.deepEquivalent()), PositionWithAffinity(prev.deepEquivalent(), UPSTREAM)));
     }
 #endif
 
     switch (rule) {
     case CanCrossEditingBoundary:
         return prev;
     case CannotCrossEditingBoundary:
         return honorEditingBoundaryAtOrBefore(prev);
     case CanSkipOverEditingBoundary:
         return skipToStartOfEditingBoundary(prev);
@@ skipping 537 matching lines @@
 
     if (m_affinity != UPSTREAM)
         return;
 
     if (isNull()) {
         m_affinity = DOWNSTREAM;
         return;
     }
 
     // When not at a line wrap, make sure to end up with DOWNSTREAM affinity.
-    if (!inSameLine(PositionWithAffinityTemplate<Strategy>(deepPosition, DOWNSTREAM), PositionWithAffinityTemplate<Strategy>(deepPosition, UPSTREAM)))
+    if (!inSameLine(PositionWithAffinityTemplate<Strategy>(deepPosition), PositionWithAffinityTemplate<Strategy>(deepPosition, UPSTREAM)))
         return;
     m_affinity = DOWNSTREAM;
 }
 
 UChar32 VisiblePosition::characterAfter() const
 {
     // We canonicalize to the first of two equivalent candidates, but the second
     // of the two candidates is the one that will be inside the text node
     // containing the character after this visible position.
     Position pos = m_deepPosition.downstream();
@@ skipping 99 matching lines @@
     else
         fprintf(stderr, "Cannot showTree for (nil) VisiblePosition.\n");
 }
 
 void showTree(const blink::VisiblePosition& vpos)
 {
     vpos.showTreeForThis();
 }
 
 #endif