Add warmup and sandbox file-read permission for testing

third_party/WebKit/Source/modules/shapedetection/FaceDetectorImpl.h

+// Copyright 2016 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 FaceDetectorImpl_h
+#define FaceDetectorImpl_h
+
+#include "core/dom/DOMRect.h"
+#include "platform/SharedBuffer.h"
+#include "public/platform/Platform.h"
+
+namespace blink {
+
+class FaceDetectorImpl {
+ public:
+  static FaceDetectorImpl* Create();
+
+  virtual HeapVector<Member<DOMRect>> detectFace(void* frameAddr,
+                                                 int width,
+                                                 int height) = 0;
+};
+}
+
+#endif  // FaceDetectorImpl_h