base: Add/Fix namespace closing comments.

base/trace_event/process_memory_totals_dump_provider_unittest.cc

 // Copyright 2015 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 "base/trace_event/process_memory_totals_dump_provider.h"
 
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/process_memory_totals.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 21 matching lines @@
 
   const uint64 rss_before = pmd_before->process_totals()->resident_set_bytes();
   const uint64 rss_after = pmd_after->process_totals()->resident_set_bytes();
 
   EXPECT_NE(0U, rss_before);
   EXPECT_NE(0U, rss_after);
 
   EXPECT_EQ(rss_after - rss_before, kAllocSize);
 }
 
-}  // namespace trace_Event
+}  // namespace trace_event
 }  // namespace base