cc: Unify namespaces for all test files

cc/test/layer_test_common.cc

 // Copyright 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 "cc/test/layer_test_common.h"
 
 #include "cc/draw_quad.h"
 #include "cc/math_util.h"
 #include "cc/region.h"
 #include "cc/render_pass.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/point_conversions.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/size_conversions.h"
 
+namespace cc {
 namespace LayerTestCommon {
 
 // Align with expected and actual output
 const char* quadString = "    Quad: ";
 
 bool canRectFBeSafelyRoundedToRect(const gfx::RectF& r)
 {
     // Ensure that range of float values is not beyond integer range.
     if (!r.IsExpressibleAsRect())
         return false;
@@ skipping 21 matching lines @@
 
         EXPECT_TRUE(rect.Contains(quadRect)) << quadString << i;
         EXPECT_TRUE(remaining.Contains(quadRect)) << quadString << i;
         remaining.Subtract(quadRect);
     }
 
     EXPECT_TRUE(remaining.IsEmpty());
 }
 
 }  // namespace LayerTestCommon
+}  // namespace cc