[CRD iOS] Ignore touch event when the touch point is out of the canvas in direct input mode

remoting/client/ui/desktop_viewport.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/ui/desktop_viewport.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 
@@ skipping 51 matching lines @@
 
 ViewMatrix::Point DesktopViewport::GetViewportCenter() const {
   if (!IsViewportReady()) {
     LOG(WARNING) << "Viewport is not ready before getting the viewport center";
     return {0.f, 0.f};
   }
   return desktop_to_surface_transform_.Invert().MapPoint(
       {surface_size_.x / 2.f, surface_size_.y / 2.f});
 }
 
+bool DesktopViewport::IsPointWithinDesktopBounds(
+    const ViewMatrix::Point& point) const {
+  if (!IsViewportReady()) {
+    LOG(WARNING) << "Viewport is not ready";
+    return false;
+  }
+  return point.x >= 0 && point.y >= 0 && point.x < desktop_size_.x &&
+         point.y < desktop_size_.y;
+}
+
 ViewMatrix::Point DesktopViewport::ConstrainPointToDesktop(
     const ViewMatrix::Point& point) const {
   if (!IsViewportReady()) {
     LOG(WARNING) << "Cannot constrain point to desktop. Viewport is not ready.";
     return point;
   }
 
   return ConstrainPointToBounds({0.f, desktop_size_.x, 0.f, desktop_size_.y},
                                 point);
 }
@@ skipping 170 matching lines @@
 
   if (new_point.y < bounds.top) {
     new_point.y = bounds.top;
   } else if (new_point.y > bounds.bottom) {
     new_point.y = bounds.bottom;
   }
   return new_point;
 }
 
 }  // namespace remoting