Introduce Promise mapping to the IDL generator

Source/bindings/scripts/code_generator_v8.py

Index: Source/bindings/scripts/code_generator_v8.py
diff --git a/Source/bindings/scripts/code_generator_v8.py b/Source/bindings/scripts/code_generator_v8.py
index 0e647b49f749dc6951e431c48ed5340f24398a0a..499932512256d46a6ddb0791b42a03cbb4a6776a 100644
--- a/Source/bindings/scripts/code_generator_v8.py
+++ b/Source/bindings/scripts/code_generator_v8.py
@@ -84,6 +84,8 @@ CPP_TYPE_SPECIAL_CONVERSION_RULES = {
     'byte': 'int',
     'boolean': 'bool',
     'DOMString': 'const String&',
+    'Promise': 'ScriptPromise',
+    'PromiseResolver': 'ScriptPromiseResolver',
 }
 CPP_UNSIGNED_TYPES = set([
     'octet',
@@ -211,6 +213,10 @@ def uncapitalize(name):
 def includes_for_type(data_type):
     if primitive_type(data_type) or data_type == 'DOMString':
         return set()
+    if data_type == 'Promise':
+        return set(['ScriptPromise.h'])
+    if data_type == 'PromiseResolver':
+        return set(['ScriptPromiseResolver.h'])
     if array_or_sequence_type(data_type):
         return includes_for_type(array_or_sequence_type(data_type))
     return set(['V8%s.h' % data_type])