Avoid nearly identical toImplArray() and toImplHeapArray()

Source/bindings/scripts/v8_types.py

Index: Source/bindings/scripts/v8_types.py
diff --git a/Source/bindings/scripts/v8_types.py b/Source/bindings/scripts/v8_types.py
index 5e8a45aad46f67fd4d5df1ced2e418bff463a361..b442b56cf28a22fd8261446c1274d8198ef56c07 100644
--- a/Source/bindings/scripts/v8_types.py
+++ b/Source/bindings/scripts/v8_types.py
@@ -590,14 +590,14 @@ def v8_value_to_cpp_value_array_or_sequence(native_array_element_type, v8_value,
         this_cpp_type = None
         ref_ptr_type = cpp_ptr_type('RefPtr', 'Member', native_array_element_type.gc_type)
         expression_format = '(to{ref_ptr_type}NativeArray<{native_array_element_type}, V8{native_array_element_type}>({v8_value}, {index}, {isolate}, exceptionState))'
-    elif native_array_element_type.is_dictionary:
-        ref_ptr_type = None
-        this_cpp_type = native_array_element_type.cpp_type
-        expression_format = 'toImplHeapArray<{cpp_type}>({v8_value}, {index}, {isolate}, exceptionState)'
     else:
         ref_ptr_type = None
         this_cpp_type = native_array_element_type.cpp_type
-        expression_format = 'toImplArray<{cpp_type}>({v8_value}, {index}, {isolate}, exceptionState)'
+        if native_array_element_type.is_dictionary:
+            vector_type = 'HeapVector'
+        else:
+            vector_type = 'Vector'
+        expression_format = 'toImplArray<%s<{cpp_type}>>({v8_value}, {index}, {isolate}, exceptionState)' % vector_type
     expression = expression_format.format(native_array_element_type=native_array_element_type.name, cpp_type=this_cpp_type, index=index, ref_ptr_type=ref_ptr_type, v8_value=v8_value, isolate=isolate)
     return expression