Plumb smooth scrolling in Chromium compositor

content/child/blink_platform_impl.cc

 // Copyright 2014 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/child/blink_platform_impl.h"
 
 #include <math.h>
 
 #include <vector>
 
@@ skipping 1127 matching lines @@
 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
     blink::WebGestureDevice device_source,
     const blink::WebFloatPoint& velocity,
     const blink::WebSize& cumulative_scroll) {
   return ui::WebGestureCurveImpl::CreateFromDefaultPlatformCurve(
              gfx::Vector2dF(velocity.x, velocity.y),
              gfx::Vector2dF(cumulative_scroll.width, cumulative_scroll.height),
              IsMainThread()).release();
 }
 
+blink::WebGestureCurve* BlinkPlatformImpl::createSmoothScrollAnimationCurve(
+    blink::WebGestureDevice device_source,
+    float start_x,
+    float start_y,
+    float dx,
+    float dy,
+    int64 duration) {
+  base::TimeDelta duration_time_delta =
+      base::TimeDelta::FromMilliseconds(duration);
+  return ui::WebGestureCurveImpl::CreateFromSmoothScrollingCurve(
+             start_x, start_y, dx, dy, duration_time_delta, IsMainThread())
+      .release();
+}
+
 void BlinkPlatformImpl::didStartWorkerRunLoop() {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStarted();
 }
 
 void BlinkPlatformImpl::didStopWorkerRunLoop() {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStopped();
 }
 
@@ skipping 206 matching lines @@
   return WebString::fromUTF8(ui::KeycodeConverter::DomCodeToCodeString(
       static_cast<ui::DomCode>(dom_code)));
 }
 
 int BlinkPlatformImpl::domEnumFromCodeString(const WebString& code) {
   return static_cast<int>(ui::KeycodeConverter::CodeStringToDomCode(
       code.utf8().data()));
 }
 
 }  // namespace content