[WIP] Re-implement MediaControls in Blink-in-JS

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 290f998146c07346171f9e3a57a6e38c9eda8ce4..35d1ec67935b893be57c6b966e3e3bde8ae2842f 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1697,6 +1697,21 @@ PassRefPtrWillBeRawPtr<ShadowRoot> Element::createShadowRoot(ExceptionState& exc
     return PassRefPtrWillBeRawPtr<ShadowRoot>(ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot));
 }
 
+PassRefPtrWillBeRawPtr<ShadowRoot> Element::createUserAgentShadowRoot(ExceptionState& exceptionState)

[haraken, 2014/08/11 11:09:33]

As discussed offline, we won't need this.

+{
+    ensureUserAgentShadowRoot();
+
+    // Some elements make assumptions about what kind of renderers they allow
+    // as children so we can't allow author shadows on them for now. An override
+    // flag is provided for testing how author shadows interact on these elements.
+    if (!areAuthorShadowsAllowed() && !RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled()) {
+        exceptionState.throwDOMException(HierarchyRequestError, "Author-created shadow roots are disabled for this element.");
+        return nullptr;
+    }
+
+    return PassRefPtrWillBeRawPtr<ShadowRoot>(ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot));
+}
+
 ShadowRoot* Element::shadowRoot() const
 {
     ElementShadow* elementShadow = shadow();