Split getClosureRepresentationInfo into MemberEntity and (ir/ast) nodes

tests/language_2/language_2_dart2js.status

 # Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Sections in this file should contain "$compiler == dart2js".
 
 # dart2js does not implement the Dart 2.0 static type errors yet.
 [ $compiler == dart2js ]
 abstract_beats_arguments_test: MissingCompileTimeError
 abstract_exact_selector_test/01: MissingCompileTimeError
@@ skipping 190 matching lines @@
 arg_param_trailing_comma_test/none: Crash
 assert_message_test: Crash
 assert_trailing_comma_test/none: CompileTimeError
 assertion_initializer_const_error2_test/cc02: Crash
 assertion_initializer_const_error2_test/none: CompileTimeError
 assertion_initializer_const_function_error_test/01: Crash
 assertion_initializer_const_function_test/01: Crash
 assertion_initializer_test: CompileTimeError
 assertion_test: Crash
 assign_instance_method_negative_test: Crash
-assign_instance_method_test: Crash
 assign_to_type_test/01: Crash
 assign_to_type_test/02: Crash
 assign_to_type_test/03: Crash
 assign_to_type_test/04: Crash
 assign_top_method_test/01: Crash
 async_and_or_test: Crash
 async_await_catch_regression_test: Crash
 async_await_foreign_test: Crash
 async_await_syntax_test/a01a: Crash
 async_await_syntax_test/a02a: Crash
@@ skipping 168 matching lines @@
 class_literal_test: Crash # Assertion failure: Cannot find value local(main_closure.call#x) in (local(main#)) for j:closure_call(main_closure.call).
 class_override_test/00: Crash
 class_test: Crash
 classes_static_method_clash_test: Crash
 closure4_test: Crash
 closure5_test: Crash
 closure6_test: Crash
 closure_break_test: Crash
 closure_cycles_test: Crash
 closure_in_constructor_test: Crash
-closure_in_field_initializer_test: Crash
 closure_in_initializer2_test: Crash
 closure_in_initializer_test: Crash
 closure_internals_test: Crash
 closure_parameter_types_test: RuntimeError
 closure_self_reference_test: Crash
 closure_shared_state_test: RuntimeError
 closure_type_variable_test: Crash # NoSuchMethodError: The getter 'typeArguments' was called on null.
 closure_type_variables_test: Crash # 'file:///usr/local/google/home/efortuna/dart/sdk/pkg/compiler/lib/src/js_model/closure.dart': Failed assertion: line 192 pos 9: 'closure != null': Corresponding closure class not found for local(A.bar#g). Closures found for (j:closure_call(Closure_fromTearOff_closure.call), local(Closure.fromTearOff#), j:closure_call(Maps_mapToString_closure.call), ..., j:closure_call(A$bar_A$bar_closure.call), local(A.bar#g))
 closure_with_super_field_test: Crash # Assertion failure: Cannot find value Instance of 'ThisLocal' in (local(B.returnSuperInClosure#)) for j:closure_call(B_returnSuperInClosure_closure.call).
 closure_with_super_send_test: Crash # Assertion failure: Cannot find value Instance of 'ThisLocal' in (local(Sub_test_closure.call#e), local(Sub.test#)) for j:closure_call(Sub_test_closure.call).
@@ skipping 119 matching lines @@
 abstract_syntax_test/00: Crash
 arg_param_trailing_comma_test/none: Crash
 assert_message_test: Crash
 assert_trailing_comma_test/none: CompileTimeError
 assertion_initializer_const_error2_test/cc02: Crash
 assertion_initializer_const_error2_test/none: CompileTimeError
 assertion_initializer_const_function_error_test/01: Crash
 assertion_initializer_test: CompileTimeError
 assertion_test: Crash
 assign_instance_method_negative_test: Crash
-assign_instance_method_test: Crash
 assign_static_type_test/03: Crash
 assign_static_type_test/04: Crash
 assign_to_type_test/01: Crash
 assign_to_type_test/02: Crash
 assign_to_type_test/03: Crash
 assign_to_type_test/04: Crash
 assign_top_method_test/01: Crash
 async_and_or_test: Crash
 async_await_catch_regression_test: Crash
 async_await_foreign_test: Crash
@@ skipping 173 matching lines @@
 class_literal_test: Crash # Assertion failure: Cannot find value local(main_closure.call#x) in (local(main#)) for j:closure_call(main_closure.call).
 class_override_test/00: Crash
 class_test: Crash
 classes_static_method_clash_test: Crash
 closure4_test: Crash
 closure5_test: Crash
 closure6_test: Crash
 closure_break_test: Crash
 closure_cycles_test: Crash
 closure_in_constructor_test: Crash
-closure_in_field_initializer_test: Crash
 closure_in_initializer2_test: Crash
 closure_in_initializer_test: Crash
 closure_internals_test: Crash
 closure_parameter_types_test: RuntimeError
 closure_self_reference_test: Crash
 closure_shared_state_test: RuntimeError
 closure_type_variable_test: Crash # NoSuchMethodError: The getter 'typeArguments' was called on null.
 closure_type_variables_test: Crash # NoSuchMethodError: The getter 'closureClassEntity' was called on null.
 closure_with_super_field_test: Crash # Assertion failure: Cannot find value Instance of 'ThisLocal' in (local(B.returnSuperInClosure#)) for j:closure_call(B_returnSuperInClosure_closure.call).
 closure_with_super_send_test: Crash # Assertion failure: Cannot find value Instance of 'ThisLocal' in (local(Sub_test_closure.call#e), local(Sub.test#)) for j:closure_call(Sub_test_closure.call).
@@ skipping 167 matching lines @@
 function_type/function_type55_test: Crash # Issue 27394
 function_type/function_type62_test: Crash # Issue 27394
 function_type/function_type63_test: Crash # Issue 27394
 function_type/function_type6_test: Crash # Issue 27394
 function_type/function_type7_test: Crash # Issue 27394
 function_type/function_type98_test: Crash # Issue 27394
 function_type/function_type99_test: Crash # Issue 27394
 
 [ $compiler == dart2js && $runtime == safarimobilesim ]
 call_through_getter_test: Fail, OK