Remove unused ScrollAnimatorNone::PerAxisData constructor argument.

The 'parent' argument is not used, remove it.

This implicitly fixes an incorrect invocation of the constructor from
ScrollAnimatorNoneTest::SavePerAxisData, which following r183583 was
passing in an uninitialized pointer value as argument.

R=mkwst
BUG=

Review URL: https://codereview.chromium.org/648273002

git-svn-id: svn://svn.chromium.org/blink/trunk@183625 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -190,7 +190,7 @@ double ScrollAnimatorNone::PerAxisData::releaseArea(Curve curve, double startT,
     return endValue - startValue;
 }
 
-ScrollAnimatorNone::PerAxisData::PerAxisData(ScrollAnimatorNone* parent, float* currentPosition, int visibleLength)
+ScrollAnimatorNone::PerAxisData::PerAxisData(float* currentPosition, int visibleLength)
     : m_currentPosition(currentPosition)
     , m_visibleLength(visibleLength)
 {
@@ -365,8 +365,8 @@ void ScrollAnimatorNone::PerAxisData::updateVisibleLength(int visibleLength)
 
 ScrollAnimatorNone::ScrollAnimatorNone(ScrollableArea* scrollableArea)
     : ScrollAnimator(scrollableArea)
-    , m_horizontalData(this, &m_currentPosX, scrollableArea->visibleWidth())
-    , m_verticalData(this, &m_currentPosY, scrollableArea->visibleHeight())
+    , m_horizontalData(&m_currentPosX, scrollableArea->visibleWidth())
+    , m_verticalData(&m_currentPosY, scrollableArea->visibleHeight())
     , m_startTime(0)
     , m_animationActive(false)
 {

third_party/WebKit/Source/platform/scroll/ScrollAnimatorNone.h

@@ -92,7 +92,7 @@ protected:
     friend class ::ScrollAnimatorNoneTest;
 
     struct PLATFORM_EXPORT PerAxisData {
-        PerAxisData(ScrollAnimatorNone* parent, float* currentPos, int visibleLength);
+        PerAxisData(float* currentPos, int visibleLength);
         void reset();
         bool updateDataFromParameters(float step, float delta, float scrollableSize, double currentTime, Parameters*);
         bool animateScroll(double currentTime);

third_party/WebKit/Source/web/tests/ScrollAnimatorNoneTest.cpp

@@ -184,7 +184,7 @@ class ScrollAnimatorNoneTest : public testing::Test {
 public:
     struct SavePerAxisData : public ScrollAnimatorNone::PerAxisData {
         SavePerAxisData(const ScrollAnimatorNone::PerAxisData& data)
-            : ScrollAnimatorNone::PerAxisData(m_mockScrollAnimatorNone.get(), 0, 768)
+            : ScrollAnimatorNone::PerAxisData(0, 768)
             , m_mockScrollableArea(true)
             , m_mockScrollAnimatorNone(MockScrollAnimatorNone::create(&m_mockScrollableArea))
         {
@@ -221,7 +221,7 @@ public:
     virtual void SetUp()
     {
         m_currentPosition = 100;
-        m_data = new ScrollAnimatorNone::PerAxisData(m_mockScrollAnimatorNone.get(), &m_currentPosition, 768);
+        m_data = new ScrollAnimatorNone::PerAxisData(&m_currentPosition, 768);
     }
     virtual void TearDown()
     {