Revert of Add TestMockTimeTaskRunner in base/test. (patchset #5 id:100001 of https://codereview.chromium.org/823143004/)

Reason for revert:
Suspect that this patch broke the chromeos asan bots. It looks like all the AutomaticRebootManagerTestInstance/AutomaticRebootManagerTest tests now leak memory:

https://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/builds/5799

Original issue's description:
> Add TestMockTimeTaskRunner in base/test.
>
> Multiple implementations of this functionality exist with slight modifications. This CL consolidates them.
>
> BUG=329911
> TBR=thestig@chromium.org  # For base/base.gyp changes.
>
> Committed: https://crrev.com/8d897fb17470c526155b2a9e86752be9a7f33c03
> Cr-Commit-Position: refs/heads/master@{#311091}

TBR=bartfab@chromium.org,phajdan.jr@chromium.org,stevenjb@chromium.org,thestig@chromium.org,engedy@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=329911

Review URL: https://codereview.chromium.org/844353002

Cr-Commit-Position: refs/heads/master@{#311114}

1 files changed, 151 insertions, 15 deletions

diff --git a/ash/system/chromeos/session/logout_confirmation_controller_unittest.cc b/ash/system/chromeos/session/logout_confirmation_controller_unittest.cc
index f459d8a..fb9d379 100644
--- a/ash/system/chromeos/session/logout_confirmation_controller_unittest.cc
+++ b/ash/system/chromeos/session/logout_confirmation_controller_unittest.cc
@@ -4,14 +4,149 @@
 
 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
 
+#include <queue>
+#include <utility>
+#include <vector>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/compiler_specific.h"
+#include "base/location.h"
 #include "base/memory/ref_counted.h"
-#include "base/test/test_mock_time_task_runner.h"
+#include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
+#include "base/time/tick_clock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ash {
+namespace {
+
+// A SingleThreadTaskRunner that mocks the current time and allows it to be
+// fast-forwarded. TODO(bartfab): Copies of this class exist in several tests.
+// Consolidate them (crbug.com/329911).
+class MockTimeSingleThreadTaskRunner : public base::SingleThreadTaskRunner {
+ public:
+  MockTimeSingleThreadTaskRunner();
+
+  // base::SingleThreadTaskRunner:
+  virtual bool RunsTasksOnCurrentThread() const override;
+  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
+                               const base::Closure& task,
+                               base::TimeDelta delay) override;
+  virtual bool PostNonNestableDelayedTask(
+      const tracked_objects::Location& from_here,
+      const base::Closure& task,
+      base::TimeDelta delay) override;
+
+  const base::TimeTicks& GetCurrentTime() const;
+
+  void FastForwardBy(base::TimeDelta delta);
+  void FastForwardUntilNoTasksRemain();
+
+ private:
+  // Strict weak temporal ordering of tasks.
+  class TemporalOrder {
+   public:
+    bool operator()(
+        const std::pair<base::TimeTicks, base::Closure>& first_task,
+        const std::pair<base::TimeTicks, base::Closure>& second_task) const;
+  };
+
+  virtual ~MockTimeSingleThreadTaskRunner();
+
+  base::TimeTicks now_;
+  std::priority_queue<std::pair<base::TimeTicks, base::Closure>,
+                      std::vector<std::pair<base::TimeTicks, base::Closure> >,
+                      TemporalOrder> tasks_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockTimeSingleThreadTaskRunner);
+};
+
+// A base::TickClock that uses a MockTimeSingleThreadTaskRunner as the source of
+// the current time.
+class MockClock : public base::TickClock {
+ public:
+  explicit MockClock(scoped_refptr<MockTimeSingleThreadTaskRunner> task_runner);
+  virtual ~MockClock();
+
+  // base::TickClock:
+  virtual base::TimeTicks NowTicks() override;
+
+ private:
+  scoped_refptr<MockTimeSingleThreadTaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockClock);
+};
+
+
+MockTimeSingleThreadTaskRunner::MockTimeSingleThreadTaskRunner() {
+}
+
+bool MockTimeSingleThreadTaskRunner::RunsTasksOnCurrentThread() const {
+  return true;
+}
+
+bool MockTimeSingleThreadTaskRunner::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  tasks_.push(std::make_pair(now_ + delay, task));
+  return true;
+}
+
+bool MockTimeSingleThreadTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  NOTREACHED();
+  return false;
+}
+
+const base::TimeTicks& MockTimeSingleThreadTaskRunner::GetCurrentTime() const {
+  return now_;
+}
+
+void MockTimeSingleThreadTaskRunner::FastForwardBy(base::TimeDelta delta) {
+  const base::TimeTicks latest = now_ + delta;
+  while (!tasks_.empty() && tasks_.top().first <= latest) {
+    now_ = tasks_.top().first;
+    base::Closure task = tasks_.top().second;
+    tasks_.pop();
+    task.Run();
+  }
+  now_ = latest;
+}
+
+void MockTimeSingleThreadTaskRunner::FastForwardUntilNoTasksRemain() {
+  while (!tasks_.empty()) {
+    now_ = tasks_.top().first;
+    base::Closure task = tasks_.top().second;
+    tasks_.pop();
+    task.Run();
+  }
+}
+
+bool MockTimeSingleThreadTaskRunner::TemporalOrder::operator()(
+    const std::pair<base::TimeTicks, base::Closure>& first_task,
+    const std::pair<base::TimeTicks, base::Closure>& second_task) const {
+  return first_task.first > second_task.first;
+}
+
+MockTimeSingleThreadTaskRunner::~MockTimeSingleThreadTaskRunner() {
+}
+
+MockClock::MockClock(scoped_refptr<MockTimeSingleThreadTaskRunner> task_runner)
+    : task_runner_(task_runner) {
+}
+
+MockClock::~MockClock() {
+}
+
+base::TimeTicks MockClock::NowTicks() {
+  return task_runner_->GetCurrentTime();
+}
+
+}  // namespace
 
 class LogoutConfirmationControllerTest : public testing::Test {
  protected:
@@ -22,7 +157,7 @@ class LogoutConfirmationControllerTest : public testing::Test {
 
   bool log_out_called_;
 
-  scoped_refptr<base::TestMockTimeTaskRunner> runner_;
+  scoped_refptr<MockTimeSingleThreadTaskRunner> runner_;
   base::ThreadTaskRunnerHandle runner_handle_;
 
   LogoutConfirmationController controller_;
@@ -33,11 +168,12 @@ class LogoutConfirmationControllerTest : public testing::Test {
 
 LogoutConfirmationControllerTest::LogoutConfirmationControllerTest()
     : log_out_called_(false),
-      runner_(new base::TestMockTimeTaskRunner),
+      runner_(new MockTimeSingleThreadTaskRunner),
       runner_handle_(runner_),
       controller_(base::Bind(&LogoutConfirmationControllerTest::LogOut,
                              base::Unretained(this))) {
-  controller_.SetClockForTesting(runner_->GetMockTickClock());
+  controller_.SetClockForTesting(
+      scoped_ptr<base::TickClock>(new MockClock(runner_)));
 }
 
 LogoutConfirmationControllerTest::~LogoutConfirmationControllerTest() {
@@ -50,7 +186,7 @@ void LogoutConfirmationControllerTest::LogOut() {
 // Verifies that the user is logged out immediately if logout confirmation with
 // a zero-length countdown is requested.
 TEST_F(LogoutConfirmationControllerTest, ZeroDuration) {
-  controller_.ConfirmLogout(runner_->GetCurrentMockTime());
+  controller_.ConfirmLogout(runner_->GetCurrentTime());
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta());
   EXPECT_TRUE(log_out_called_);
@@ -59,7 +195,7 @@ TEST_F(LogoutConfirmationControllerTest, ZeroDuration) {
 // Verifies that the user is logged out when the countdown expires.
 TEST_F(LogoutConfirmationControllerTest, DurationExpired) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(9));
   EXPECT_FALSE(log_out_called_);
@@ -72,12 +208,12 @@ TEST_F(LogoutConfirmationControllerTest, DurationExpired) {
 // out when the new countdown expires.
 TEST_F(LogoutConfirmationControllerTest, DurationShortened) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(30));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(30));
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(9));
   EXPECT_FALSE(log_out_called_);
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(9));
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(2));
@@ -89,12 +225,12 @@ TEST_F(LogoutConfirmationControllerTest, DurationShortened) {
 // out when the original countdown expires.
 TEST_F(LogoutConfirmationControllerTest, DurationExtended) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(9));
   EXPECT_FALSE(log_out_called_);
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(2));
   EXPECT_TRUE(log_out_called_);
 }
@@ -103,7 +239,7 @@ TEST_F(LogoutConfirmationControllerTest, DurationExtended) {
 // user is not logged out, even when the original countdown expires.
 TEST_F(LogoutConfirmationControllerTest, Lock) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   controller_.OnLockStateChanged(true);
   runner_->FastForwardUntilNoTasksRemain();
@@ -114,7 +250,7 @@ TEST_F(LogoutConfirmationControllerTest, Lock) {
 // out immediately.
 TEST_F(LogoutConfirmationControllerTest, UserAccepted) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   controller_.OnLogoutConfirmed();
   EXPECT_TRUE(log_out_called_);
@@ -124,7 +260,7 @@ TEST_F(LogoutConfirmationControllerTest, UserAccepted) {
 // out, even when the original countdown expires.
 TEST_F(LogoutConfirmationControllerTest, UserDenied) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   controller_.OnDialogClosed();
   runner_->FastForwardUntilNoTasksRemain();
@@ -136,14 +272,14 @@ TEST_F(LogoutConfirmationControllerTest, UserDenied) {
 // expires.
 TEST_F(LogoutConfirmationControllerTest, DurationExpiredAfterDeniedRequest) {
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   controller_.OnDialogClosed();
   runner_->FastForwardUntilNoTasksRemain();
   EXPECT_FALSE(log_out_called_);
 
   controller_.ConfirmLogout(
-      runner_->GetCurrentMockTime() + base::TimeDelta::FromSeconds(10));
+      runner_->GetCurrentTime() + base::TimeDelta::FromSeconds(10));
   EXPECT_FALSE(log_out_called_);
   runner_->FastForwardBy(base::TimeDelta::FromSeconds(9));
   EXPECT_FALSE(log_out_called_);