dart2js cps: Set result of 'await' to dynamic instead of empty.

tests/language/language_dart2js.status

 # Copyright (c) 2012, 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.
 
 [ $compiler == dart2js ]
 sync_generator2_test/07: MissingCompileTimeError # Issue 22324
 sync_generator2_test/08: MissingCompileTimeError # Issue 22324
 sync_generator2_test/10: MissingCompileTimeError # Issue 22324
 getter_setter_in_lib_test: Fail # Issue 23288
 
@@ skipping 250 matching lines @@
 async_await_syntax_test/d06a: Crash # (await for(var o in st){}): await for
 async_await_syntax_test/d07a: Crash # (()sync*{yield 0;}): cannot handle sync*/async* functions
 async_await_syntax_test/d08a: Crash # (()sync*{yield* [] ;}): cannot handle sync*/async* functions
 async_await_syntax_test/d08b: Crash # (()sync*{yield* 0+1;}): cannot handle sync*/async* functions
 async_await_syntax_test/d09a: Crash # (()async*{yield 0;}): cannot handle sync*/async* functions
 async_await_syntax_test/d10a: Crash # (()async*{yield* [] ;}): cannot handle sync*/async* functions
 async_await_test/02: Crash # (switch (v){label:ca...  continue to a labeled switch case
 async_await_test/03: Crash # (switch (v){label:ca...  continue to a labeled switch case
 async_await_test/none: Crash # (switch (v){label:ca...  continue to a labeled switch case
 async_continue_label_test/await_in_init: RuntimeError # Please triage this failure.
-async_continue_label_test/await_in_update: RuntimeError # Please triage this failure.
 async_or_generator_return_type_stacktrace_test/02: Crash # (void badReturnTypeAsyncStar()async*{}): cannot handle sync*/async* functions
 async_or_generator_return_type_stacktrace_test/03: Crash # (void badReturnTypeSyncStar()sync*{}): cannot handle sync*/async* functions
 async_star_await_pauses_test: Crash # (await for(var i in ...  await for
 async_star_cancel_and_throw_in_finally_test: Crash # (foo()async*{try {in...  cannot handle sync*/async* functions
 async_star_cancel_while_paused_test: Crash # (f()async*{list.add(...  cannot handle sync*/async* functions
 async_star_regression_2238_test: Crash # (f()async*{label1:label2:yield 0;}): cannot handle sync*/async* functions
 async_star_regression_23116_test: Crash # (Stream<int> foo(Com...  cannot handle sync*/async* functions
 async_star_regression_fisk_test: Crash # (fisk()async*{res.ad...  cannot handle sync*/async* functions
 async_star_stream_take_test: Crash # (await for(var v in s.take(5))r+= v;): await for
 async_star_take_reyield_test: Crash # (fivePartialSums(Str...  cannot handle sync*/async* functions
 async_star_test: Crash # (f()async*{}): cannot handle sync*/async* functions
-async_switch_test/none: RuntimeError # Uncaught Error: Expect.equals(expected: <1>, actual: <null>) fails.
-async_switch_test/withDefault: RuntimeError # Uncaught Error: Expect.equals(expected: <1>, actual: <null>) fails.
 asyncstar_concat_test: Crash # (concat(a,b)async*{yield* a;yield* b;}): cannot handle sync*/async* functions
 asyncstar_throw_in_catch_test: Crash # (foo4(Tracer tracer)...  cannot handle sync*/async* functions
 asyncstar_yield_test: Crash # (Stream<int> foo4()a...  cannot handle sync*/async* functions
 asyncstar_yieldstar_test: Crash # (foo2(Stream subStream)async*{yield* subStream;}): cannot handle sync*/async* functions
 await_for_cancel_test: Crash # (await for(var x in controller.stream){for(int j=0;j<10;j++ ){if(j==5)continue outer;}}): await for
 await_for_test: Crash # (await for(var x in infiniteStream()){i++ ;if(i>10)break;t4.record(x);}): await for
 await_for_use_local_test: Crash # (await for(var v in s){accum+= v;}): await for
-await_future_test: Timeout
+await_future_test: RuntimeError # Uncaught Error: NullError: method not found: '_await_future_test$_box_0' on null
+await_postfix_expr_test: RuntimeError # Uncaught Error: NullError: method not found: '$add' on null
 await_regression_test: RuntimeError # "Obelix".then$1 is not a function
+await_test: RuntimeError # Uncaught Error: NullError: method not found: '$add' on null
 cha_deopt1_test: Crash # (d.make_u()): deferred access is not implemented
 cha_deopt2_test: Crash # (d.make_u()): deferred access is not implemented
 cha_deopt3_test: Crash # (d.make_u()): deferred access is not implemented
 closure_in_constructor_test: RuntimeError # Typed lists.
 closures_initializer_test: RuntimeError # Please triage this failure.
 const_evaluation_test/01: Crash # (static Iterable<Str...  cannot handle sync*/async* functions
 constructor12_test: RuntimeError # Please triage this failure.
 crash_6725_test/01: Crash # unsupported operation on erroneous element
 cyclic_default_values_test: RuntimeError # Z.cyclic_default_values_test__foo$closure is not a function
 deferred_call_empty_before_load_test: Crash # (lib1.thefun()): deferred access is not implemented
@@ skipping 92 matching lines @@
 sync_generator3_test/test1: Crash # (f()sync*{try {yield...  cannot handle sync*/async* functions
 sync_generator3_test/test2: Crash # (g()sync*{try {yield "a";throw "pow!";}finally {yield "b";}}): cannot handle sync*/async* functions
 syncstar_less_than_test: Crash # (Iterable<int> foo()...  cannot handle sync*/async* functions
 syncstar_yield_test/copyParameters: Crash # (Iterable<int> foo3(int p)sync*{int i=0;i++ ;p++ ;yield p+i;}): cannot handle sync*/async* functions
 syncstar_yield_test/none: Crash # (Iterable<int> foo3(int p)sync*{int i=0;i++ ;p++ ;yield p+i;}): cannot handle sync*/async* functions
 syncstar_yieldstar_test: Crash # (foo()sync*{yield* [1,2,3];yield null;yield* bar();}): cannot handle sync*/async* functions
 type_variable_closure2_test: RuntimeError # Please triage this failure.
 type_variable_field_initializer_closure_test: RuntimeError # Please triage this failure.
 type_variable_field_initializer_test: RuntimeError # Please triage this failure.
 type_variable_nested_test: RuntimeError # Please triage this failure.