Add kythe support to plugins and format the spec files

pkg/analyzer_plugin/lib/protocol/protocol_constants.dart

Index: pkg/analyzer_plugin/lib/protocol/protocol_constants.dart
diff --git a/pkg/analyzer_plugin/lib/protocol/protocol_constants.dart b/pkg/analyzer_plugin/lib/protocol/protocol_constants.dart
index 79e7f8d1a785078e3e2a15d6e331c3abbc490af6..cb38cbfd6288dcebfb14185ee555d823d3f5cee0 100644
--- a/pkg/analyzer_plugin/lib/protocol/protocol_constants.dart
+++ b/pkg/analyzer_plugin/lib/protocol/protocol_constants.dart
@@ -80,6 +80,10 @@ const String EDIT_RESPONSE_GET_REFACTORING_FINAL_PROBLEMS = 'finalProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_INITIAL_PROBLEMS = 'initialProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_OPTIONS_PROBLEMS = 'optionsProblems';
 const String EDIT_RESPONSE_GET_REFACTORING_POTENTIAL_EDITS = 'potentialEdits';
+const String KYTHE_REQUEST_GET_KYTHE_ENTRIES = 'kythe.getKytheEntries';
+const String KYTHE_REQUEST_GET_KYTHE_ENTRIES_FILE = 'file';
+const String KYTHE_RESPONSE_GET_KYTHE_ENTRIES_ENTRIES = 'entries';
+const String KYTHE_RESPONSE_GET_KYTHE_ENTRIES_FILES = 'files';
 const String PLUGIN_NOTIFICATION_ERROR = 'plugin.error';
 const String PLUGIN_NOTIFICATION_ERROR_IS_FATAL = 'isFatal';
 const String PLUGIN_NOTIFICATION_ERROR_MESSAGE = 'message';