Send scroll animation takeOver message in the same frame that it's created

third_party/WebKit/Source/platform/scroll/ScrollAnimatorTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 568 matching lines @@
     EXPECT_EQ(FloatSize(110, 90), animator->implOnlyAnimationAdjustmentForTesting());
 
     animator->updateCompositorAnimations();
 
     EXPECT_EQ(animator->m_runState, ScrollAnimatorCompositorCoordinator::RunState::Idle);
     EXPECT_FALSE(animator->hasAnimationThatRequiresService());
     EXPECT_TRUE(animator->implOnlyAnimationAdjustmentForTesting().isZero());
 
     // Verify that the takeover update is cleared.
     animator->takeOverImplOnlyScrollOffsetAnimation();
-    EXPECT_TRUE(animator->hasAnimationThatRequiresService());
-    animator->updateCompositorAnimations();
     EXPECT_FALSE(animator->hasAnimationThatRequiresService());
 
     // Forced GC in order to finalize objects depending on the mock object.
     ThreadHeap::collectAllGarbage();
 }
 
 TEST(ScrollAnimatorTest, MainThreadAnimationTargetAdjustment)
 {
     MockScrollableArea* scrollableArea = MockScrollableArea::create(true);
     ScrollAnimator* animator = new ScrollAnimator(scrollableArea, getMockedTime);
@@ skipping 38 matching lines @@
     animator->updateCompositorAnimations();
     animator->tickAnimation(getMockedTime());
     EXPECT_EQ(FloatPoint(110, 90), animator->currentPosition());
     reset(*animator);
 
     // Forced GC in order to finalize objects depending on the mock object.
     ThreadHeap::collectAllGarbage();
 }
 
 } // namespace blink