Remove Dashboard support and supporting files.

Source/WebCore/html/HTMLEmbedElement.cpp

Index: Source/WebCore/html/HTMLEmbedElement.cpp
diff --git a/Source/WebCore/html/HTMLEmbedElement.cpp b/Source/WebCore/html/HTMLEmbedElement.cpp
index b731c52882379636c4d526b3f91c635282a75c7b..d492c8b95a49bfa2edde2d62a594ad6b0d94cca9 100644
--- a/Source/WebCore/html/HTMLEmbedElement.cpp
+++ b/Source/WebCore/html/HTMLEmbedElement.cpp
@@ -192,15 +192,6 @@ bool HTMLEmbedElement::rendererIsNeeded(const NodeRenderingContext& context)
             return false;
         }
     }
-
-#if ENABLE(DASHBOARD_SUPPORT)
-    // Workaround for <rdar://problem/6642221>. 
-    if (Settings* settings = frame->settings()) {
-        if (settings->usesDashboardBackwardCompatibilityMode())
-            return true;
-    }
-#endif
-
     return HTMLPlugInImageElement::rendererIsNeeded(context);
 }