Move thread from test/ to util/thread/.

util/thread/thread_posix.cc

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "test/thread.h"
+#include "util/thread/thread.h"
 
-#include "gtest/gtest.h"
-#include "test/errors.h"
+#include "base/logging.h"
 
 namespace crashpad {
-namespace test {
 
 void Thread::Start() {
-  ASSERT_FALSE(platform_thread_);
+  DCHECK(!platform_thread_);
   int rv = pthread_create(&platform_thread_, nullptr, ThreadEntryThunk, this);
-  ASSERT_EQ(0, rv) << ErrnoMessage(rv, "pthread_create");
+  PCHECK(0 == rv);
 }
 
 void Thread::Join() {
-  ASSERT_TRUE(platform_thread_);
+  DCHECK(platform_thread_);
   int rv = pthread_join(platform_thread_, nullptr);
-  EXPECT_EQ(0, rv) << ErrnoMessage(rv, "pthread_join");
+  PCHECK(0 == rv);
   platform_thread_ = 0;
 }
 
 // static
 void* Thread::ThreadEntryThunk(void* argument) {
   Thread* self = reinterpret_cast<Thread*>(argument);
   self->ThreadMain();
   return nullptr;
 }
 
-}  // namespace test
 }  // namespace crashpad