Eliminate ash::internal namespace

ash/wm/workspace/magnetism_matcher_unittest.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 "testing/gtest/include/gtest/gtest.h"
 
 namespace ash {
-namespace internal {
 
 // Trivial test case verifying assertions on left edge.
 TEST(MagnetismMatcherTest, TrivialLeft) {
   const int distance = MagnetismMatcher::kMagneticDistance;
   const gfx::Rect initial_bounds(20, 10, 50, 60);
   MagnetismMatcher matcher(initial_bounds, kAllMagnetismEdges);
   EXPECT_FALSE(matcher.AreEdgesObscured());
   MatchedEdge edge;
   EXPECT_FALSE(matcher.ShouldAttach(
                    gfx::Rect(initial_bounds.x() - distance - 10,
@@ skipping 138 matching lines @@
                    gfx::Rect(initial_bounds.x() - 4,
                              160, 3, 20), &edge));
   // Should match the following which extends into non-overlapping region.
   EXPECT_TRUE(matcher.ShouldAttach(
                    gfx::Rect(initial_bounds.x() - 4,
                              140, 3, 20), &edge));
   EXPECT_EQ(MAGNETISM_EDGE_LEFT, edge.primary_edge);
   EXPECT_EQ(SECONDARY_MAGNETISM_EDGE_NONE, edge.secondary_edge);
 }
 
-}  // namespace internal
 }  // namespace ash