Clarifies the status of implicit accessors; fixed several related bugs.

test_reflectable/.status

Index: test_reflectable/.status
diff --git a/test_reflectable/.status b/test_reflectable/.status
index 1ecb20bbcdc3638f39eaaee812823b151bca14d4..a4919d42f839d5a974a2f51069d4aa02bda6be1c 100644
--- a/test_reflectable/.status
+++ b/test_reflectable/.status
@@ -10,9 +10,9 @@ test/*_test: skip # Some needed mirror features not implemented by dart2js.
 
 [ ($compiler == none && $runtime != dartium) || $compiler == dart2js || $compiler == dartanalyzer || $compiler == dart2analyzer]
 build/test/new_instance_default_values_test: CompileTimeError # Issue #8
-build/test/parameter_mirrors_test: CompileTimeError # Missing implementation
+build/test/parameter_mirrors_test: CompileTimeError # Issue #8

[sigurdm, 2015/08/20 09:39:52]

Maybe we should split this up into a test with the features that works, and one
only using the problematic feature in order to get higher coverage.

[eernst, 2015/08/20 10:43:25]

Yes. The problem emerged because I added code to include information about
parameters, and you added metadata to a parameter, independently, and then we
require moving code when those two get together.

So maybe we should just remove that `@C()` annotation on the parameter, and
create a new test that puts metadata annotations in many different locations,
and checks them?

[sigurdm, 2015/08/20 10:46:34]

That would work too

 
 [ ($compiler == none && $runtime == dartium) ]
 build/test/new_instance_default_values_test: RuntimeError # Issue #8
-build/test/parameter_mirrors_test: RuntimeError # Missing implementation
+build/test/parameter_mirrors_test: RuntimeError # Issue #8