Migrate test block 3 to Dart 2.0.

tests/corelib/corelib.status

Index: tests/corelib/corelib.status
diff --git a/tests/corelib/corelib.status b/tests/corelib/corelib.status
index acf422809ef19da71f454bd7f168a0fa9bb94eaf..8ca3dd57d9fc4f90710ea98443e14f5d89fc59c9 100644
--- a/tests/corelib/corelib.status
+++ b/tests/corelib/corelib.status
@@ -6,8 +6,6 @@
 *: SkipByDesign # tests/corelib_strong has the strong mode versions of these tests.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
-bool_from_environment2_test: Skip
-bool_from_environment_test: Skip
 from_environment_const_type_test: Skip
 from_environment_const_type_undefined_test: Skip
 int_from_environment2_test: Skip
@@ -19,7 +17,6 @@ string_from_environment_test: Skip
 
 [ $compiler == none || $compiler == precompiler || $compiler == app_jit ]
 unicode_test: Fail        # Bug 6706
-compare_to2_test: Fail    # Bug 4018
 symbol_test/01: Fail, Pass # bug 11669
 
 # With the exception of 'void', new Symbol() should not accept reserved words.
@@ -105,8 +102,6 @@ iterable_return_type_test/02: RuntimeError # Dart2js does not support Uint64*.
 iterable_to_list_test/01: RuntimeError # Issue 26501
 
 big_integer_*: Skip # VM specific test.
-bit_twiddling_bigint_test: RuntimeError # Requires bigint support.
-compare_to2_test: RuntimeError, OK    # Requires bigint support.
 string_base_vm_test: RuntimeError, OK # VM specific test.
 nan_infinity_test/01: Fail # Issue 11551
 regexp/pcre_test: Pass, Slow # Issue 21593
@@ -227,12 +222,6 @@ symbol_test/none: RuntimeError # Issue 27394
 regress/4562_test/01: Crash # Issue 27394
 
 [ ($compiler == dartk || $compiler == dartkp) && ($runtime == vm || $runtime == dart_precompiled) ]
-bool_from_environment2_test/01: MissingCompileTimeError
-bool_from_environment2_test/02: MissingCompileTimeError
-bool_from_environment2_test/03: MissingCompileTimeError
-bool_from_environment2_test/04: MissingCompileTimeError
-bool_from_environment2_test/05: MissingCompileTimeError
-compare_to2_test: RuntimeError
 int_from_environment3_test/01: MissingCompileTimeError
 int_from_environment3_test/02: MissingCompileTimeError
 int_from_environment3_test/03: MissingCompileTimeError
@@ -290,7 +279,6 @@ apply3_test: CompileTimeError
 format_exception_test: RuntimeError # Flutter Issue 9111
 string_from_environment_test: Fail # Flutter Issue 9111
 string_from_environment2_test: Fail # Flutter Issue 9111
-bool_from_environment_test: Fail # Flutter Issue 9111
 int_from_environment_test: Fail # Flutter Issue 9111
 int_from_environment2_test: Fail # Flutter Issue 9111
 from_environment_const_type_test/none: Fail # Flutter Issue 9111