Use conversion helpers in V8Binding.cpp for [Clamp] method arguments

Source/bindings/scripts/v8_types.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 479 matching lines @@
     if native_array_element_type:
         return v8_value_to_cpp_value_array_or_sequence(native_array_element_type, v8_value, index)
 
     # Simple types
     idl_type = idl_type.preprocessed_type
     add_includes_for_type(idl_type)
     base_idl_type = idl_type.base_type
 
     if 'EnforceRange' in extended_attributes:
         arguments = ', '.join([v8_value, 'EnforceRange', 'exceptionState'])
+    elif 'Clamp' in extended_attributes:
+        arguments = ', '.join([v8_value, 'Clamp', 'exceptionState'])
     elif idl_type.v8_conversion_needs_exception_state:
         arguments = ', '.join([v8_value, 'exceptionState'])
     else:
         arguments = v8_value
 
     if base_idl_type in V8_VALUE_TO_CPP_VALUE:
         cpp_expression_format = V8_VALUE_TO_CPP_VALUE[base_idl_type]
     elif idl_type.is_typed_array_element_type:
         cpp_expression_format = (
             '{v8_value}->Is{idl_type}() ? '
@@ skipping 311 matching lines @@
 
 
 def is_explicit_nullable(idl_type):
     # Nullable type that isn't implicit nullable (see above.) For such types,
     # we use Nullable<T> or similar explicit ways to represent a null value.
     return idl_type.is_nullable and not idl_type.is_implicit_nullable
 
 IdlTypeBase.is_implicit_nullable = property(is_implicit_nullable)
 IdlUnionType.is_implicit_nullable = False
 IdlTypeBase.is_explicit_nullable = property(is_explicit_nullable)