Reland of Move tracing namespace from base::debug to base::trace_event.

base/trace_event/trace_event_synthetic_delay_unittest.cc

 // Copyright 2014 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/trace_event_synthetic_delay.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
-namespace debug {
+namespace trace_event {
 namespace {
 
 const int kTargetDurationMs = 100;
 // Allow some leeway in timings to make it possible to run these tests with a
 // wall clock time source too.
 const int kShortDurationMs = 10;
 
 }  // namespace
 
 class TraceEventSyntheticDelayTest : public testing::Test,
@@ skipping 122 matching lines @@
   EXPECT_FALSE(end_times[1].is_null());
 
   delay->EndParallel(end_times[0]);
   EXPECT_GE((Now() - start_time).InMilliseconds(), kTargetDurationMs);
 
   start_time = Now();
   delay->EndParallel(end_times[1]);
   EXPECT_LT((Now() - start_time).InMilliseconds(), kShortDurationMs);
 }
 
-}  // namespace debug
+}  // namespace trace_event
 }  // namespace base