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

sky/engine/bindings-dart/common/common.gypi

Index: sky/engine/bindings-dart/common/common.gypi
diff --git a/sky/engine/bindings-dart/common/common.gypi b/sky/engine/bindings-dart/common/common.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..45d03361e07d4193b735ba69e3bd38d13efe6793
--- /dev/null
+++ b/sky/engine/bindings-dart/common/common.gypi
@@ -0,0 +1,31 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+    'variables': {
+        'bindings_common_dir': '.',
+        'bindings_common_files': [
+            'AbstractArrayValue.h',
+            'AbstractScriptPromise.h',
+            'AbstractScriptPromiseResolver.h',
+            'AbstractScriptValue.h',
+            'ArrayValue.h',
+            'BindingSecurity.cpp',
+            'BindingSecurity.h',
+            'DeleteResult.h',
+            'ExceptionMessages.cpp',
+            'ExceptionMessages.h',
+            'ExceptionState.h',
+            'ExceptionStatePlaceholder.cpp',
+            'ExceptionStatePlaceholder.h',
+            'Nullable.h',
+            'ScheduledAction.h',
+            'ScriptPromiseResolver.h',
+            'ScriptState.h',
+            'ScriptValue.cpp',
+            'ScriptValue.h',
+            'ScriptWrappable.h',
+        ],
+    },
+}