Migrate test block 7 to Dart 2.0.

tests/corelib_2/corelib_2.status

Index: tests/corelib_2/corelib_2.status
diff --git a/tests/corelib_2/corelib_2.status b/tests/corelib_2/corelib_2.status
index f4b9128207e2d71678faa77bc044d41a0ce6ba6b..2313a0a137b1fd2126628f8e4b2ddd2961a33a39 100644
--- a/tests/corelib_2/corelib_2.status
+++ b/tests/corelib_2/corelib_2.status
@@ -22,6 +22,7 @@ string_replace_static_test: MissingCompileTimeError
 string_static_test: MissingCompileTimeError
 
 [ $compiler == dart2analyzer && !$strong ]
+duration2_test: Skip # Static verification only

[Bob Nystrom, 2017/07/25 22:05:43]

I think we can just delete this test. It's validating what happens if you pass a
string to new Duration(), but that's a type error now. I don't think we need to
keep it around for validating the static error since there's nothing
particularly interesting about this particular static error.

[jcollins, 2017/08/02 21:03:25]

Done.

 symbol_reserved_word_test/05: MissingCompileTimeError # Issue 30245
 symbol_test/04: MissingCompileTimeError # Issue 30245
 
@@ -62,6 +63,11 @@ compare_to2_test: RuntimeError, OK # Requires bigint support.
 [ $compiler == dart2js && $runtime == drt && $csp && $minified ]
 core_runtime_types_test: Pass, Fail # Issue 27913
 
+[ $compiler == dart2js || $runtime == vm ]
+duration2_test: MissingCompileTimeError
+error_stack_trace_test/static: MissingCompileTimeError
+
+
 [ $runtime == flutter ]
 apply3_test: CompileTimeError # mirrors not supported
 bool_from_environment_test: Fail # Flutter Issue 9111
@@ -187,6 +193,7 @@ symbol_test/none: RuntimeError # Issue 27394
 string_static_test: MissingCompileTimeError
 
 [ $compiler == dart2js && $runtime != none]
+error_stack_trace1_test: RuntimeError # Issue 12399
 symbol_reserved_word_test/03: RuntimeError # Issue 19972, new Symbol('void') should be allowed.
 
 [ ($compiler == none && $runtime == vm) || $compiler == dart2js ]