Move fling implementation from renderer to browser:

content/browser/renderer_host/input/fling/fling_curve_configuration.cc

+// Copyright (c) 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 "content/browser/renderer_host/input/fling/fling_curve_configuration.h"
+
+#include "base/logging.h"
+#include "content/browser/renderer_host/input/fling/fling_curve.h"
+#include "content/browser/renderer_host/input/fling/fling_curve_impl.h"
+
+namespace content {
+
+FlingCurveConfiguration::FlingCurveConfiguration() { }
+
+FlingCurveConfiguration::~FlingCurveConfiguration() { }
+
+void FlingCurveConfiguration::SetCurveParameters(
+    const std::vector<float>& new_touchpad,
+    const std::vector<float>& new_touchscreen) {
+  DCHECK(new_touchpad.size() >= 3);
+  DCHECK(new_touchscreen.size() >= 3);
+  base::AutoLock scoped_lock(lock_);
+  touchpad_coefs_ = new_touchpad;
+  touchscreen_coefs_ = new_touchscreen;
+}
+
+FlingCurve* FlingCurveConfiguration::CreateCore(
+    const std::vector<float>& coefs,
+    const gfx::PointF& velocity,
+    const gfx::Point& cumulative_scroll) {
+  float p0, p1, p2;
+
+  {
+    base::AutoLock scoped_lock(lock_);
+    p0 = coefs[0];
+    p1 = coefs[1];
+    p2 = coefs[2];
+  }
+
+  return FlingCurveImpl::Create(velocity, p0, p1, p2, cumulative_scroll);
+}
+
+FlingCurve* FlingCurveConfiguration::CreateForTouchPad(
+    const gfx::PointF& velocity,
+    const gfx::Point& cumulative_scroll) {
+  return CreateCore(touchpad_coefs_, velocity, cumulative_scroll);
+}
+
+FlingCurve* FlingCurveConfiguration::CreateForTouchScreen(
+    const gfx::PointF& velocity,
+    const gfx::Point& cumulative_scroll) {
+  return CreateCore(touchscreen_coefs_, velocity, cumulative_scroll);
+}
+
+} // namespace webkit_glue