Move modules-dependent IDL statements out of core by supporting 'implements' in RHS interface

Source/bindings/scripts/utilities.py

Index: Source/bindings/scripts/utilities.py
diff --git a/Source/bindings/scripts/utilities.py b/Source/bindings/scripts/utilities.py
index 0f16281b79fb434dd877b586cb211b245dc9a9ad..df1cc15b1b69d09514875d6fb9a2fb2c86d91738 100644
--- a/Source/bindings/scripts/utilities.py
+++ b/Source/bindings/scripts/utilities.py
@@ -58,15 +58,12 @@ def get_partial_interface_name_from_idl(file_contents):
     return match and match.group(1)
 
 
-def get_implemented_interfaces_from_idl(file_contents, interface_name):
+def get_right_or_left_interfaces_of_implements_from_idl(file_contents, interface_name, get_right):
     # Rule is: identifier-A implements identifier-B;
     # http://www.w3.org/TR/WebIDL/#idl-implements-statements
-    def get_implemented(left_identifier, right_identifier):
-        # identifier-A must be the current interface
-        if left_identifier != interface_name:
-            raise IdlBadFilenameError("Identifier on the left of the 'implements' statement should be %s in %s.idl, but found %s" % (interface_name, interface_name, left_identifier))
-        return right_identifier
-
+    # Get the right interfaces (identifier-Bs) when the statements are in the left interface (identifier-A) IDL.
+    # Get the left interfaces (identifier-As) when the statements are in the right interface (identifier-B) IDL.
+    # Support both cases to avoid layering violation.
     implements_re = (r'^\s*'
                      r'(\w+)\s+'
                      r'implements\s+'
@@ -75,7 +72,15 @@ def get_implemented_interfaces_from_idl(file_contents, interface_name):
     implements_matches = re.finditer(implements_re, file_contents, re.MULTILINE)
     implements_pairs = [(match.group(1), match.group(2))
                         for match in implements_matches]
-    return [get_implemented(left, right) for left, right in implements_pairs]
+    left_or_right_interfaces = []
+    for left, right in implements_pairs:
+        if get_right:
+            if left == interface_name:
+                left_or_right_interfaces.append(right)
+        else:
+            if right == interface_name:
+                left_or_right_interfaces.append(left)
+    return left_or_right_interfaces
 
 
 def is_callback_interface_from_idl(file_contents):