android: move overscroll effects to ui/

ui/android/animation_utils.h

 // 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.
 
-#ifndef CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_
-#define CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_
+#ifndef UI_ANDROID_ANIMATION_UTILS_H_
+#define UI_ANDROID_ANIMATION_UTILS_H_
 
-namespace content {
+namespace ui {
 
 template <typename T>
 T Lerp(T a, T b, T t) {
   return a + (b - a) * t;
 }
 
 template <typename T>
 T Clamp(T value, T low, T high) {
   return value < low ? low : (value > high ? high : value);
 }
 
 template <typename T>
 T Damp(T input, T factor) {
   T result;
   if (factor == 1) {
     result = 1 - (1 - input) * (1 - input);
   } else {
     result = 1 - std::pow(1 - input, 2 * factor);
   }
   return result;
 }
 
-}  // namespace content
+}  // namespace ui
 
-#endif  // CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_
+#endif  // UI_ANDROID_ANIMATION_UTILS_H_