Correctly update scroll offset animations in response to scroll anchoring

third_party/WebKit/Source/platform/animation/CompositorScrollOffsetAnimationCurve.cpp

 // Copyright 2016 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/animation/CompositorScrollOffsetAnimationCurve.h"
 #include "platform/animation/TimingFunction.h"
 
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
 
@@ skipping 42 matching lines @@
 {
     m_curve->SetInitialValue(gfx::ScrollOffset(initialValue.x(), initialValue.y()));
 }
 
 FloatPoint CompositorScrollOffsetAnimationCurve::getValue(double time) const
 {
     gfx::ScrollOffset value = m_curve->GetValue(base::TimeDelta::FromSecondsD(time));
     return FloatPoint(value.x(), value.y());
 }
 
+void CompositorScrollOffsetAnimationCurve::applyAdjustment(IntSize adjustment)
+{
+    m_curve->ApplyAdjustment(gfx::Vector2dF(adjustment.width(), adjustment.height()));
+}
+
 double CompositorScrollOffsetAnimationCurve::duration() const
 {
     return m_curve->Duration().InSecondsF();
 }
 
 FloatPoint CompositorScrollOffsetAnimationCurve::targetValue() const
 {
     gfx::ScrollOffset target = m_curve->target_value();
     return FloatPoint(target.x(), target.y());
 }
 
 void CompositorScrollOffsetAnimationCurve::updateTarget(double time, FloatPoint newTarget)
 {
     m_curve->UpdateTarget(time, gfx::ScrollOffset(newTarget.x(), newTarget.y()));
 }
 
 std::unique_ptr<cc::AnimationCurve> CompositorScrollOffsetAnimationCurve::cloneToAnimationCurve() const
 {
     return m_curve->Clone();
 }
 
 } // namespace blink