dart2js cps: Add a pass for eliminating bounds checks.

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 216 matching lines @@
 regress_22443_test: Pass,RuntimeError # Issue 17458
 
 [ $compiler == dart2js && $cps_ir == false ]
 generic_field_mixin5_test: Crash # Issue 18651
 many_method_calls_test: Crash # Stack overflow in HGraphVisitor.visitPostDominatorTree.visitBasicBlockAndSuccessors
 
 [ $compiler == dart2js && ($runtime == d8 || $runtime == jsshell) ]
 issue23244_test: RuntimeError # 23244
 
 [ $compiler == dart2js && $cps_ir ]
+assert_assignable_type_test: Crash # Internal Error: Pending statics.
 async_await_syntax_test/a03a: Crash # (a03a()async*{}): cannot handle sync*/async* functions
 async_await_syntax_test/a03b: Crash # (a03b()async*{}): cannot handle sync*/async* functions
 async_await_syntax_test/a06a: Crash # (await for(var o in st){}): await for
 async_await_syntax_test/a09a: Crash # (a09a()async*{yield 0;}): cannot handle sync*/async* functions
 async_await_syntax_test/a10a: Crash # (a10a()async*{yield* [] ;}): cannot handle sync*/async* functions
 async_await_syntax_test/a11d: Crash # (get async async*{}): cannot handle sync*/async* functions
 async_await_syntax_test/b03a: Crash # (b03a()async*{}): cannot handle sync*/async* functions
 async_await_syntax_test/b06a: Crash # (await for(var o in st){}): await for
 async_await_syntax_test/b09a: Crash # (b09a()async*{yield 0;}): cannot handle sync*/async* functions
 async_await_syntax_test/b10a: Crash # (b10a()async*{yield* [] ;}): cannot handle sync*/async* functions
@@ skipping 136 matching lines @@
 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.
 
 [ $compiler == dart2js && $cps_ir && $host_checked ]
 async_throw_in_catch_test/forceAwait: Crash # Issue 24485
 async_throw_in_catch_test/none: Crash # Issue 24485
 execute_finally9_test: Crash # Issue 24485
 regress_21795_test: Crash # Issue 24485
 regress_23537_test: Crash # Issue 24485