Add support for V8 and Firefox stack traces in pkg/stack_trace.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 0ca216e34a8b8cef96b1455bc9e224fe51ebc37b..750f3844eac27d3f97d8491874aead791c90ca97 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -57,6 +57,7 @@ crypto/test/sha1_test: Fail # Issue 11407.
 [ $runtime == vm ]
 pathos/test/pathos_dartium_test: Fail, OK # Uses dart:html
 pathos/test/pathos_dart2js_test: Fail, OK # Uses dart:html
+stack_trace/test/dartium_test: Fail, OK # Dartium-specific traces
 intl/test/find_default_locale_browser_test: Skip
 intl/test/date_time_format_http_request_test: Skip
 
@@ -103,6 +104,7 @@ crypto/test/sha1_test: Fail # V8 bug: https://code.google.com/p/v8/issues/detail
 
 [ $compiler == dart2js && $browser ]
 pathos/test/pathos_dartium_test: Fail # Issue 6490
+stack_trace/test/dartium_test: Fail, OK # Dartium-specific traces
 crypto/test/sha256_test: Slow, Pass
 crypto/test/sha1_test: Slow, Pass
 
@@ -130,6 +132,7 @@ oauth2/test/client_test: Fail, OK # Uses dart:io.
 oauth2/test/credentials_test: Fail, OK # Uses dart:io.
 oauth2/test/handle_access_token_response_test: Fail, OK # Uses dart:io.
 pathos/test/pathos_io_test: Fail, OK # Uses dart:io.
+stack_trace/test/vm_test: Fail, OK # VM-specific method names.
 
 scheduled_test/test/descriptor/async_test: Fail # http://dartbug.com/8440
 scheduled_test/test/descriptor/directory_test: Fail # http://dartbug.com/8440
@@ -154,9 +157,6 @@ scheduled_test/test/scheduled_test/timeout_test: Fail # http://dartbug.com/8440
 scheduled_test/test/scheduled_test/wrap_async_test: Fail # http://dartbug.com/8440
 scheduled_test/test/scheduled_test/wrap_future_test: Fail # http://dartbug.com/8440
 
-stack_trace/test/frame_test: Fail # http://dartbug.com/6943
-stack_trace/test/trace_test: Fail # http://dartbug.com/6943
-
 
 [ $runtime == safari]
  # Bug in JSC: the test only passes when being debugged.