Eliminate ash::internal namespace

ash/wm/workspace/magnetism_matcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/workspace/magnetism_matcher.h"
 
 #include <algorithm>
 #include <cmath>
 
 namespace ash {
-namespace internal {
-
 namespace {
 
 // Returns true if |a| is close enough to |b| that the two edges snap.
 bool IsCloseEnough(int a, int b) {
   return abs(a - b) <= MagnetismMatcher::kMagneticDistance;
 }
 
 // Returns true if the specified SecondaryMagnetismEdge can be matched with a
 // primary edge of |primary|. |edges| is a bitmask of the allowed
 // MagnetismEdges.
@@ skipping 160 matching lines @@
     } else if (CanMatchSecondaryEdge(edge, SECONDARY_MAGNETISM_EDGE_TRAILING,
                                      edges_) &&
                IsCloseEnough(bounds.right(), src_bounds.right())) {
       *secondary_edge = SECONDARY_MAGNETISM_EDGE_TRAILING;
     } else {
       *secondary_edge = SECONDARY_MAGNETISM_EDGE_NONE;
     }
   }
 }
 
-}  // namespace internal
 }  // namespace ash