bindings: Drop |idl_name| from IdlDefinitions

|idl_name| comes from filename but it's a bad idea to control code
generation by using filename. Fortunately we no longer use it, so let's
remove it.

BUG=658098

Review-Url: https://codereview.chromium.org/2446923002
Cr-Commit-Position: refs/heads/master@{#427281}

third_party/WebKit/Source/bindings/scripts/idl_reader.py

@@ -111,7 +111,7 @@ class IdlReader(object):
         if not ast:
             raise Exception('Failed to parse %s' % idl_filename)
         idl_file_basename, _ = os.path.splitext(os.path.basename(idl_filename))
-        definitions = IdlDefinitions(idl_file_basename, ast)
+        definitions = IdlDefinitions(ast)
 
         validate_blink_idl_definitions(
             idl_filename, idl_file_basename, definitions)

third_party/WebKit/Source/bindings/scripts/v8_interface.py

@@ -446,7 +446,7 @@ def methods_context(interface):
     compute_method_overloads_context(interface, methods)
 
     def generated_method(return_type, name, arguments=None, extended_attributes=None, implemented_as=None):
-        operation = IdlOperation(interface.idl_name)
+        operation = IdlOperation()
         operation.idl_type = return_type
         operation.name = name
         if arguments:
@@ -459,7 +459,7 @@ def methods_context(interface):
         return v8_methods.method_context(interface, operation)
 
     def generated_argument(idl_type, name, is_optional=False, extended_attributes=None):
-        argument = IdlArgument(interface.idl_name)
+        argument = IdlArgument()
         argument.idl_type = idl_type
         argument.name = name
         argument.is_optional = is_optional