Use a ResizeObserver to determine default font-size for text tracks

third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.h

Index: third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.h b/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.h
deleted file mode 100644
index 15c66ffbcec01cf0f36b2f492aa638ee7d347e0f..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/layout/LayoutTextTrackContainer.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
- * Copyright (C) 2012 Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef LayoutTextTrackContainer_h
-#define LayoutTextTrackContainer_h
-
-#include "core/layout/LayoutBlockFlow.h"
-#include "platform/geometry/IntSize.h"
-
-namespace blink {
-
-class Element;
-class LayoutVideo;
-
-class LayoutTextTrackContainer final : public LayoutBlockFlow {
- public:
-  LayoutTextTrackContainer(Element*);
-
- private:
-  void GetLayout() override;
-
-  bool UpdateSizes(const LayoutVideo&);
-
-  float font_size_;
-};
-
-}  // namespace blink
-
-#endif  // LayoutTextTrackContainer_h