Refactor Scroll Customization to share cc::ScrollStateData with blink.

cc/input/scroll_state.cc

 // 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 "cc/input/scroll_state.h"
 
 #include <utility>
 
 #include "cc/layers/layer_impl.h"
 
 namespace cc {
 
 ScrollState::ScrollState(double delta_x,
                          double delta_y,
                          int start_position_x,
                          int start_position_y,
                          double velocity_x,
                          double velocity_y,
                          bool is_beginning,
                          bool is_in_inertial_phase,
                          bool is_ending,
                          bool should_propagate,
-                         bool delta_consumed_for_scroll_sequence,
-                         bool is_direct_manipulation)
+                         bool is_direct_manipulation,
+                         bool delta_consumed_for_scroll_sequence)
     : data_(delta_x,
             delta_y,
             start_position_x,
             start_position_y,
             velocity_x,
             velocity_y,
             is_beginning,
             is_in_inertial_phase,
             is_ending,
             should_propagate,
-            delta_consumed_for_scroll_sequence,
-            is_direct_manipulation) {}
+            true,  // TODO(tdresser): populate from_user_input.
+            is_direct_manipulation,
+            0,  // TODO(tdresser): populate delta_granularity.
+            delta_consumed_for_scroll_sequence) {}
 
 ScrollState::ScrollState(ScrollStateData data) : data_(data) {}
 
 ScrollState::~ScrollState() {}
 
 void ScrollState::ConsumeDelta(double x, double y) {
   data_.delta_x -= x;
   data_.delta_y -= y;
 
   if (x || y)
     data_.delta_consumed_for_scroll_sequence = true;
 }
 
 void ScrollState::DistributeToScrollChainDescendant() {
   if (!scroll_chain_.empty()) {
     LayerImpl* next = scroll_chain_.front();
     scroll_chain_.pop_front();
     next->DistributeScroll(this);
   }
 }
 
 }  // namespace cc