Add a basic sky-element custom element

sky/engine/core/html/parser/HTMLScriptRunner.cpp

Index: sky/engine/core/html/parser/HTMLScriptRunner.cpp
diff --git a/sky/engine/core/html/parser/HTMLScriptRunner.cpp b/sky/engine/core/html/parser/HTMLScriptRunner.cpp
index e0bab6300dbe993013f914b7da15ae6703902889..2cdb3846d357d63fb04546c2d0ffd176f7157d1f 100644
--- a/sky/engine/core/html/parser/HTMLScriptRunner.cpp
+++ b/sky/engine/core/html/parser/HTMLScriptRunner.cpp
@@ -115,8 +115,11 @@ void HTMLScriptRunner::executeLibrary(RefPtr<AbstractModule> module,
   // or script failures, etc.
   Microtask::performCheckpoint();
 
-  if (LocalFrame* frame = contextFrame(m_element.get()))
-    frame->dart().ExecuteLibraryInModule(module.get(), library->dart_value());
+  if (LocalFrame* frame = contextFrame(m_element.get())) {
+    frame->dart().ExecuteLibraryInModule(module.get(),

[eseidel, 2015/02/21 00:08:13]

We should just pass the script and hang the library off hte script.

[abarth-chromium, 2015/02/21 05:40:05]

Ok.  I'll do this in a later CL.

+                                         library->dart_value(),
+                                         m_element.get());
+  }
 
   advanceTo(StateCompleted);
   // We may be deleted at this point.