android: move overscroll effects to ui/

content/browser/android/edge_effect_base.cc

-// Copyright 2015 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/android/edge_effect_base.h"
-
-namespace content {
-
-// static
-gfx::Transform EdgeEffectBase::ComputeTransform(Edge edge,
-                                                const gfx::SizeF& viewport_size,
-                                                float offset) {
-  // Transforms assume the edge layers are anchored to their *top center point*.
-  switch (edge) {
-    case EDGE_TOP:
-      return gfx::Transform(1, 0, 0, 1, 0, offset);
-    case EDGE_LEFT:
-      return gfx::Transform(0, 1, -1, 0, -viewport_size.height() / 2.f + offset,
-                            viewport_size.height() / 2.f);
-    case EDGE_BOTTOM:
-      return gfx::Transform(-1, 0, 0, -1, 0, viewport_size.height() + offset);
-    case EDGE_RIGHT:
-      return gfx::Transform(0, -1, 1, 0, -viewport_size.height() / 2.f +
-                                             viewport_size.width() + offset,
-                            viewport_size.height() / 2.f);
-    default:
-      NOTREACHED() << "Invalid edge: " << edge;
-      return gfx::Transform();
-  };
-}
-
-// static
-gfx::SizeF EdgeEffectBase::ComputeOrientedSize(
-    Edge edge,
-    const gfx::SizeF& viewport_size) {
-  switch (edge) {
-    case EDGE_TOP:
-    case EDGE_BOTTOM:
-      return viewport_size;
-    case EDGE_LEFT:
-    case EDGE_RIGHT:
-      return gfx::SizeF(viewport_size.height(), viewport_size.width());
-    default:
-      NOTREACHED() << "Invalid edge: " << edge;
-      return gfx::SizeF();
-  };
-}
-
-}  // namespace content