Blink Platform: Remove time functions from Platform.

third_party/WebKit/Source/platform/TimerTest.cpp

 // Copyright 2015 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 "platform/Timer.h"
 
 #include "platform/testing/TestingPlatformSupport.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebThread.h"
@@ skipping 262 matching lines @@
         return static_cast<MockWebScheduler*>(m_webThread->scheduler());
     }
 
     OwnPtr<FakeWebThread> m_webThread;
 };
 
 class TimerTest : public testing::Test {
 public:
     void SetUp() override
     {
-        WTF::setMonotonicallyIncreasingTimeFunction(currentTime);
+        m_originalTimeFunction = setTimeFunctionsForTesting(currentTime);
 
         m_runTimes.clear();
         gCurrentTimeSecs = 10.0;
         m_startTime = gCurrentTimeSecs;
     }
 
+    void TearDown() override
+    {
+        setTimeFunctionsForTesting(m_originalTimeFunction);
+    }
+
     void countingTask(Timer<TimerTest>*)
     {
         m_runTimes.append(monotonicallyIncreasingTime());
     }
 
     void recordNextFireTimeTask(Timer<TimerTest>* timer)
     {
         m_nextFireTimes.append(monotonicallyIncreasingTime() + timer->nextFireInterval());
     }
 
@@ skipping 27 matching lines @@
         return m_platform.nextTimerTaskDelaySecs();
     }
 
 protected:
     double m_startTime;
     WTF::Vector<double> m_runTimes;
     WTF::Vector<double> m_nextFireTimes;
 
 private:
     TimerTestPlatform m_platform;
+    TimeFunction m_originalTimeFunction;
 };
 
 TEST_F(TimerTest, StartOneShot_Zero)
 {
     Timer<TimerTest> timer(this, &TimerTest::countingTask);
     timer.startOneShot(0, BLINK_FROM_HERE);
 
     ASSERT(hasOneTimerTask());
     EXPECT_FLOAT_EQ(0.0, nextTimerTaskDelaySecs());
 
@@ skipping 382 matching lines @@
         m_startTime + 6.0,
         m_startTime + 8.0,
         m_startTime + 10.0,
         m_startTime + 14.0,
         m_startTime + 18.0,
         m_startTime + 28.0));
 }
 
 } // namespace
 } // namespace blink