Replace old with new synthetic gesture framework.

content/browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.cc

-// Copyright (c) 2012 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 "content/browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.h"
-
-#include "base/debug/trace_event.h"
-#include "content/browser/renderer_host/render_widget_host_impl.h"
-
-namespace content {
-
-BasicMouseWheelSmoothScrollGesture::BasicMouseWheelSmoothScrollGesture(
-    bool scroll_down, int pixels_to_scroll,
-    int mouse_event_x, int mouse_event_y)
-    : scroll_down_(scroll_down),
-      pixels_scrolled_(0),
-      pixels_to_scroll_(pixels_to_scroll),
-      mouse_event_x_(mouse_event_x),
-      mouse_event_y_(mouse_event_y) { }
-
-BasicMouseWheelSmoothScrollGesture::~BasicMouseWheelSmoothScrollGesture() { }
-
-bool BasicMouseWheelSmoothScrollGesture::ForwardInputEvents(
-    base::TimeTicks now, RenderWidgetHost* host) {
-
-  if (pixels_scrolled_ >= pixels_to_scroll_)
-    return false;
-
-  float position_delta = synthetic_gesture_calculator_.GetDelta(
-      now,
-      RenderWidgetHostImpl::From(host)->GetSyntheticGestureMessageInterval());
-
-
-  blink::WebMouseWheelEvent event;
-  event.type = blink::WebInputEvent::MouseWheel;
-  event.hasPreciseScrollingDeltas = 0;
-  event.deltaY = scroll_down_ ? -position_delta : position_delta;
-  // TODO(vollick): find a proper way to access
-  // WebCore::WheelEvent::tickMultiplier.
-  event.wheelTicksY = event.deltaY / 120;
-  event.modifiers = 0;
-
-  // TODO(nduca): Figure out plausible x and y values.
-  event.globalX = 0;
-  event.globalY = 0;
-  event.x = mouse_event_x_;
-  event.y = mouse_event_y_;
-  event.windowX = event.x;
-  event.windowY = event.y;
-  host->ForwardWheelEvent(event);
-
-  pixels_scrolled_ += abs(event.deltaY);
-
-  TRACE_COUNTER_ID1(
-      "gpu", "smooth_scroll_by_pixels_scrolled", this, pixels_scrolled_);
-
-  return true;
-}
-
-}  // content
-