Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/shared_lib/DartLibraryMain.cpp

Index: sky/engine/bindings-dart/core/dart/shared_lib/DartLibraryMain.cpp
diff --git a/sky/engine/bindings/tests/idls/TestInterfaceDocument.idl b/sky/engine/bindings-dart/core/dart/shared_lib/DartLibraryMain.cpp
similarity index 86%
copy from sky/engine/bindings/tests/idls/TestInterfaceDocument.idl
copy to sky/engine/bindings-dart/core/dart/shared_lib/DartLibraryMain.cpp
index 2a687e871a44bace871a2d7b65243bbbdedc7339..e1a73345da4fccf48c166e464d0a6d980a43cf4a 100644
--- a/sky/engine/bindings/tests/idls/TestInterfaceDocument.idl
+++ b/sky/engine/bindings-dart/core/dart/shared_lib/DartLibraryMain.cpp
@@ -28,5 +28,12 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-interface TestInterfaceDocument : Document {
-};
+#if !defined(DART_SHARED_LIB)
+#error This is only intended to be used when Dart is used as a shared library.
+#endif
+
+// Unused entry point for a shared library containing the Dart VM.
+int main(int argc, char** argv)
+{
+    return 0;
+}