Move fling implementation from renderer to browser:

content/browser/renderer_host/input/fling/fling_curve_impl_android.h

+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_FLING_FLING_CURVE_IMPL_ANDROID_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_FLING_FLING_CURVE_IMPL_ANDROID_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "content/browser/renderer_host/input/fling/fling_curve.h"
+#include "content/common/content_export.h"
+#include "ui/gfx/point.h"
+#include "ui/gfx/point_f.h"
+
+namespace content {
+
+class CONTENT_EXPORT FlingCurveImplAndroid : public FlingCurve {
+ public:
+  FlingCurveImplAndroid();
+  virtual ~FlingCurveImplAndroid();
+
+  void StartFling(const gfx::PointF& velocity);
+
+  // Overridden from FlingCurve.
+  virtual bool Apply(double time_in_secs, FlingCurveTarget* target) OVERRIDE;
+
+  static bool RegisterJni(JNIEnv*);
+
+ private:
+  // Returns true if the animation is not yet finished.
+  bool UpdatePosition();
+  gfx::Point GetCurrentPosition();
+  float GetCurrentVelocity();
+  virtual void CancelFling();
+
+  bool is_active_;
+
+  // Java OverScroller instance and methods.
+  base::android::ScopedJavaGlobalRef<jobject> java_scroller_;
+
+  gfx::Point last_position_;
+  gfx::PointF last_velocity_;
+  double last_time_;
+
+  DISALLOW_COPY_AND_ASSIGN(FlingCurveImplAndroid);
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_FLING_FLING_CURVE_IMPL_ANDROID_H_