Move platform_thread to base/threading and put in the base namespace. I left ...

base/tools_sanity_unittest.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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/message_loop.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace base {
+
 namespace {
 
 // We use caps here just to ensure that the method name doesn't interfere with
 // the wildcarded suppressions.
 class TOOLS_SANITY_TEST_CONCURRENT_THREAD : public PlatformThread::Delegate {
  public:
   explicit TOOLS_SANITY_TEST_CONCURRENT_THREAD(bool *value) : value_(value) {}
   ~TOOLS_SANITY_TEST_CONCURRENT_THREAD() {}
   void ThreadMain() {
     *value_ = true;
@@ skipping 109 matching lines @@
       new TOOLS_SANITY_TEST_CONCURRENT_THREAD(&shared);
 
   PlatformThread::Create(0, thread1, &a);
   PlatformThread::Create(0, thread2, &b);
   PlatformThread::Join(a);
   PlatformThread::Join(b);
   EXPECT_TRUE(shared);
   delete thread1;
   delete thread2;
 }
+
+}  // namespace base