Add a separate call to initialize the bounds for a sky <iframe> element.

sky/engine/core/frame/RemoteFrame.h

Index: sky/engine/core/frame/RemoteFrame.h
diff --git a/sky/engine/core/frame/RemoteFrame.h b/sky/engine/core/frame/RemoteFrame.h
new file mode 100644
index 0000000000000000000000000000000000000000..1cf8c5bbb5609a99851da2f413f540f52a36fa66
--- /dev/null
+++ b/sky/engine/core/frame/RemoteFrame.h
@@ -0,0 +1,35 @@
+// Copyright 2014 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 RemoteFrame_h
+#define RemoteFrame_h
+
+#include "mojo/services/public/cpp/view_manager/view_observer.h"
+
+namespace mojo {
+class View;
+}
+
+namespace blink {
+
+class IntRect;
+
+// This class encapsulates the mojo View that backs an HTMLIFrameElement.

[abarth-chromium, 2014/11/10 23:03:51]

Why encapsulate?  Can't folks just use a mojo::View directly?  I think you're
missing RemoteFrame.cpp so maybe there's non-trivial code there. :)

[Matt Perry, 2014/11/10 23:35:34]

I was expecting there to be more methods eventually, like detach(). But I guess
I can encapsulate later if needed.

+class RemoteFrame : public mojo::ViewObserver {
+public:
+    RemoteFrame(mojo::View* view);
+    virtual ~RemoteFrame() {}
+
+    void setBounds(const IntRect& bounds);
+
+private:
+    // ViewObserver methods:
+    void OnViewDestroyed(mojo::View* view) override;
+
+    mojo::View* m_view;
+};
+
+} // namespace blink
+
+#endif // RemoteFrame_h