Reland "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)

Reland the base->rtc_base without adding stub headers (will be
done in follow-up CL). This preserves git blame history of all files.

BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org

Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012
Reviewed-on: https://chromium-review.googlesource.com/554611
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18821}

webrtc/rtc_base/platform_thread_unittest.cc

@@ -0,0 +1,128 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/platform_thread.h"
+
+#include "webrtc/system_wrappers/include/sleep.h"
+#include "webrtc/test/gtest.h"
+
+namespace rtc {
+namespace {
+// Function that does nothing, and reports success.
+bool NullRunFunctionDeprecated(void* obj) {
+  webrtc::SleepMs(2);  // Hand over timeslice, prevents busy looping.
+  return true;
+}
+
+bool TooBusyRunFunction(void* obj) {
+  // Indentionally busy looping.
+  return true;
+}
+
+void NullRunFunction(void* obj) {}
+
+// Function that sets a boolean.
+bool SetFlagRunFunctionDeprecated(void* obj) {
+  bool* obj_as_bool = static_cast<bool*>(obj);
+  *obj_as_bool = true;
+  webrtc::SleepMs(0);  // Hand over timeslice, prevents busy looping.
+  return true;
+}
+
+void SetFlagRunFunction(void* obj) {
+  bool* obj_as_bool = static_cast<bool*>(obj);
+  *obj_as_bool = true;
+}
+
+}  // namespace
+
+TEST(PlatformThreadTest, StartStopDeprecated) {
+  PlatformThread thread(&NullRunFunctionDeprecated, nullptr,
+                        "PlatformThreadTest");
+  EXPECT_TRUE(thread.name() == "PlatformThreadTest");
+  EXPECT_TRUE(thread.GetThreadRef() == 0);
+  thread.Start();
+  EXPECT_TRUE(thread.GetThreadRef() != 0);
+  thread.Stop();
+  EXPECT_TRUE(thread.GetThreadRef() == 0);
+}
+
+TEST(PlatformThreadTest, StartStop2Deprecated) {
+  PlatformThread thread1(&NullRunFunctionDeprecated, nullptr,
+                         "PlatformThreadTest1");
+  PlatformThread thread2(&NullRunFunctionDeprecated, nullptr,
+                         "PlatformThreadTest2");
+  EXPECT_TRUE(thread1.GetThreadRef() == thread2.GetThreadRef());
+  thread1.Start();
+  thread2.Start();
+  EXPECT_TRUE(thread1.GetThreadRef() != thread2.GetThreadRef());
+  thread2.Stop();
+  thread1.Stop();
+}
+
+TEST(PlatformThreadTest, RunFunctionIsCalledDeprecated) {
+  bool flag = false;
+  PlatformThread thread(&SetFlagRunFunctionDeprecated, &flag,
+                        "RunFunctionIsCalled");
+  thread.Start();
+
+  // At this point, the flag may be either true or false.
+  thread.Stop();
+
+  // We expect the thread to have run at least once.
+  EXPECT_TRUE(flag);
+}
+
+TEST(PlatformThreadTest, StartStop) {
+  PlatformThread thread(&NullRunFunction, nullptr, "PlatformThreadTest");
+  EXPECT_TRUE(thread.name() == "PlatformThreadTest");
+  EXPECT_TRUE(thread.GetThreadRef() == 0);
+  thread.Start();
+  EXPECT_TRUE(thread.GetThreadRef() != 0);
+  thread.Stop();
+  EXPECT_TRUE(thread.GetThreadRef() == 0);
+}
+
+TEST(PlatformThreadTest, StartStop2) {
+  PlatformThread thread1(&NullRunFunction, nullptr, "PlatformThreadTest1");
+  PlatformThread thread2(&NullRunFunction, nullptr, "PlatformThreadTest2");
+  EXPECT_TRUE(thread1.GetThreadRef() == thread2.GetThreadRef());
+  thread1.Start();
+  thread2.Start();
+  EXPECT_TRUE(thread1.GetThreadRef() != thread2.GetThreadRef());
+  thread2.Stop();
+  thread1.Stop();
+}
+
+TEST(PlatformThreadTest, RunFunctionIsCalled) {
+  bool flag = false;
+  PlatformThread thread(&SetFlagRunFunction, &flag, "RunFunctionIsCalled");
+  thread.Start();
+
+  // At this point, the flag may be either true or false.
+  thread.Stop();
+
+  // We expect the thread to have run at least once.
+  EXPECT_TRUE(flag);
+}
+
+// This test is disabled since it will cause a crash.
+// There might be a way to implement this as a death test, but it looks like
+// a death test requires an expression to be checked but does not allow a
+// flag to be raised that says "some thread will crash after this point".
+// TODO(tommi): Look into ways to enable the test by default.
+TEST(PlatformThreadTest, DISABLED_TooBusyDeprecated) {
+  PlatformThread thread(&TooBusyRunFunction, nullptr, "BusyThread");
+  thread.Start();
+  webrtc::SleepMs(1000);
+  thread.Stop();
+}
+
+}  // rtc