BrowserPlugin/WebView - Move plugin lifetime to DOM

Source/core/html/HTMLFrameOwnerElement.h

Index: Source/core/html/HTMLFrameOwnerElement.h
diff --git a/Source/core/html/HTMLFrameOwnerElement.h b/Source/core/html/HTMLFrameOwnerElement.h
index 834ac123c70af030eaf94926ddb244fb900c836b..3686c8b22eb06abb092970f2fff60188466a0842 100644
--- a/Source/core/html/HTMLFrameOwnerElement.h
+++ b/Source/core/html/HTMLFrameOwnerElement.h
@@ -31,6 +31,7 @@ class ExceptionState;
 class Frame;
 class RenderPart;
 class SVGDocument;
+class Widget;
 
 class HTMLFrameOwnerElement : public HTMLElement {
 public:
@@ -62,6 +63,8 @@ public:
     virtual void renderFallbackContent() { }
 
     virtual bool isObjectElement() const { return false; }
+    void setWidget(PassRefPtr<Widget>);
+    Widget* widget() const;
 
 protected:
     HTMLFrameOwnerElement(const QualifiedName& tagName, Document&);
@@ -74,6 +77,7 @@ private:
     virtual bool isFrameOwnerElement() const OVERRIDE { return true; }
 
     Frame* m_contentFrame;
+    RefPtr<Widget> m_widget;
     SandboxFlags m_sandboxFlags;
 };