Remove Dashboard support and supporting files.

Source/WebCore/html/HTMLElement.cpp

Index: Source/WebCore/html/HTMLElement.cpp
diff --git a/Source/WebCore/html/HTMLElement.cpp b/Source/WebCore/html/HTMLElement.cpp
index f25e50fb4775f6d53141b41883c8412a4b1a5985..6aede888e98905da88ced7e44bd6a354afcb3a16 100644
--- a/Source/WebCore/html/HTMLElement.cpp
+++ b/Source/WebCore/html/HTMLElement.cpp
@@ -114,15 +114,6 @@ bool HTMLElement::ieForbidsInsertHTML() const
         || hasLocalName(sourceTag)
         || hasLocalName(wbrTag))
         return true;
-    // FIXME: I'm not sure why dashboard mode would want to change the
-    // serialization of <canvas>, that seems like a bad idea.
-#if ENABLE(DASHBOARD_SUPPORT)
-    if (hasLocalName(canvasTag)) {
-        Settings* settings = document()->settings();
-        if (settings && settings->usesDashboardBackwardCompatibilityMode())
-            return true;
-    }
-#endif
     return false;
 }