Change overscroll functions to pass floats.

chrome/browser/ui/views/frame/scroll_end_effect_controller_ash.cc

 // Copyright 2013 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 "chrome/browser/ui/views/frame/scroll_end_effect_controller_ash.h"
 
 ScrollEndEffectController* ScrollEndEffectController::Create() {
   return new ScrollEndEffectControllerAsh();
 }
 
 ScrollEndEffectControllerAsh::ScrollEndEffectControllerAsh() {
 }
 
 ScrollEndEffectControllerAsh::~ScrollEndEffectControllerAsh() {
 }
 
-void ScrollEndEffectControllerAsh::OverscrollUpdate(int delta_y) {
+void ScrollEndEffectControllerAsh::OverscrollUpdate(float delta_y) {
   // TODO(rharrison): Implement initial version of scroll end effect
 }