Remove dead code processing wheel gesture phase.

third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm

Index: third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
diff --git a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
index 0a52e4f0a41ef2577f468dc6d1b8fbe304fc13a4..fa1161ce4499b34ba90d1509d2fb4472accbd9b4 100644
--- a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
+++ b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.mm
@@ -871,25 +871,6 @@ void ScrollAnimatorMac::contentAreaDidHide() const {
   [m_scrollbarPainterController.get() windowOrderedOut];
 }
 
-void ScrollAnimatorMac::didBeginScrollGesture() const {
-  if (!getScrollableArea()->scrollbarsCanBeActive())
-    return;
-  [m_scrollbarPainterController.get() beginScrollGesture];
-}
-
-void ScrollAnimatorMac::didEndScrollGesture() const {
-  if (!getScrollableArea()->scrollbarsCanBeActive())
-    return;
-  [m_scrollbarPainterController.get() endScrollGesture];
-}
-
-void ScrollAnimatorMac::mayBeginScrollGesture() const {
-  if (!getScrollableArea()->scrollbarsCanBeActive())
-    return;
-  [m_scrollbarPainterController.get() beginScrollGesture];
-  [m_scrollbarPainterController.get() contentAreaScrolled];
-}
-
 void ScrollAnimatorMac::finishCurrentScrollAnimations() {
   [m_scrollbarPainterController.get() hideOverlayScrollers];
 }
@@ -972,21 +953,6 @@ void ScrollAnimatorMac::cancelAnimation() {
   m_haveScrolledSincePageLoad = false;
 }
 
-void ScrollAnimatorMac::handleWheelEventPhase(PlatformWheelEventPhase phase) {
-  // This may not have been set to true yet if the wheel event was handled by
-  // the ScrollingTree,
-  // So set it to true here.
-  m_haveScrolledSincePageLoad = true;
-
-  if (phase == PlatformWheelEventPhaseBegan)
-    didBeginScrollGesture();
-  else if (phase == PlatformWheelEventPhaseEnded ||
-           phase == PlatformWheelEventPhaseCancelled)
-    didEndScrollGesture();
-  else if (phase == PlatformWheelEventPhaseMayBegin)
-    mayBeginScrollGesture();
-}
-
 void ScrollAnimatorMac::updateScrollerStyle() {
   if (!getScrollableArea()->scrollbarsCanBeActive()) {
     m_needsScrollerStyleUpdate = true;