ResizeObserver pt1: IDLs with stubs

third_party/WebKit/Source/core/observer/ResizeObserverEntry.cpp

Index: third_party/WebKit/Source/core/observer/ResizeObserverEntry.cpp
diff --git a/third_party/WebKit/Source/core/observer/ResizeObserverEntry.cpp b/third_party/WebKit/Source/core/observer/ResizeObserverEntry.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0a10d0a6e1b0002a85dfaea123241df984108095
--- /dev/null
+++ b/third_party/WebKit/Source/core/observer/ResizeObserverEntry.cpp
@@ -0,0 +1,26 @@
+// 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.
+
+#include "core/observer/ResizeObserverEntry.h"
+
+#include "core/dom/ClientRect.h"
+#include "core/dom/DOMRectReadOnly.h"
+#include "core/dom/Element.h"
+
+namespace blink {
+
+class ResizeObservation;
+
+ResizeObserverEntry::ResizeObserverEntry(Element* target)
+    : m_target(target)
+{
+}
+
+DEFINE_TRACE(ResizeObserverEntry)
+{
+    visitor->trace(m_target);
+    visitor->trace(m_contentRect);
+}
+
+} // namespace blink