Move renderFallbackContent() into FrameOwner interface.

Source/core/html/HTMLObjectElement.cpp

Index: Source/core/html/HTMLObjectElement.cpp
diff --git a/Source/core/html/HTMLObjectElement.cpp b/Source/core/html/HTMLObjectElement.cpp
index a1e4cd2d46b37567ce7c0b32cbacc90ee653355a..f5b9935c50d5f5e8a4ebdf5e384471a8d6422d33 100644
--- a/Source/core/html/HTMLObjectElement.cpp
+++ b/Source/core/html/HTMLObjectElement.cpp
@@ -360,13 +360,13 @@ void HTMLObjectElement::reattachFallbackContent()
         lazyReattachIfAttached();
 }
 
-void HTMLObjectElement::renderFallbackContent()
+bool HTMLObjectElement::renderFallbackContent()
 {
-    if (useFallbackContent())
-        return;
-
     if (!inDocument())
-        return;
+        return false;
+
+    if (useFallbackContent())
+        return true;
 
     // Before we give up and use fallback content, check to see if this is a MIME type issue.
     if (m_imageLoader && m_imageLoader->image() && m_imageLoader->image()->status() != Resource::LoadError) {
@@ -375,7 +375,7 @@ void HTMLObjectElement::renderFallbackContent()
             // If we don't think we have an image type anymore, then clear the image from the loader.
             m_imageLoader->setImage(0);
             reattachFallbackContent();
-            return;
+            return true;
         }
     }
 
@@ -383,6 +383,7 @@ void HTMLObjectElement::renderFallbackContent()
 
     // FIXME: Style gets recalculated which is suboptimal.
     reattachFallbackContent();
+    return true;
 }
 
 bool HTMLObjectElement::isExposed() const