[CRD iOS] Move UI stuff into a subdirectory

remoting/client/direct_input_strategy.cc

-// Copyright 2017 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 "remoting/client/direct_input_strategy.h"
-#include "remoting/client/desktop_viewport.h"
-
-namespace remoting {
-
-DirectInputStrategy::DirectInputStrategy() {}
-
-DirectInputStrategy::~DirectInputStrategy() {}
-
-void DirectInputStrategy::HandlePinch(float pivot_x,
-                                      float pivot_y,
-                                      float scale,
-                                      DesktopViewport* viewport) {
-  viewport->ScaleDesktop(pivot_x, pivot_y, scale);
-}
-
-void DirectInputStrategy::HandlePan(float translation_x,
-                                    float translation_y,
-                                    bool is_dragging_mode,
-                                    DesktopViewport* viewport) {
-  if (is_dragging_mode) {
-    // If the user is dragging something, we should synchronize the movement
-    // with the object that the user is trying to move on the desktop, rather
-    // than moving the desktop around.
-    ViewMatrix::Vector2D viewport_movement =
-        viewport->GetTransformation().Invert().MapVector(
-            {translation_x, translation_y});
-    viewport->MoveViewport(viewport_movement.x, viewport_movement.y);
-    return;
-  }
-
-  viewport->MoveDesktop(translation_x, translation_y);
-}
-
-void DirectInputStrategy::FindCursorPositions(float touch_x,
-                                              float touch_y,
-                                              const DesktopViewport& viewport,
-                                              float* cursor_x,
-                                              float* cursor_y) {
-  ViewMatrix::Point cursor_position =
-      viewport.GetTransformation().Invert().MapPoint({touch_x, touch_y});
-  *cursor_x = cursor_position.x;
-  *cursor_y = cursor_position.y;
-}
-
-bool DirectInputStrategy::IsCursorVisible() const {
-  return false;
-}
-
-}  // namespace remoting