Cleanups in the Mojo package.

mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart

Index: mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart
diff --git a/mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart b/mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart
index 3e6201a0f41058318bcb361061f821ab44dfb0e0..c2de1a6586e19c99c6f983093e9cce41dfb77f5f 100644
--- a/mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart
+++ b/mojo/dart/packages/mojo/sdk_ext/src/handle_watcher.dart
@@ -34,8 +34,8 @@ class MojoHandleWatcher {
 
   /// Stops watching and closes the given [handleToken].
   ///
-  /// Returns an integer, encoding the result as specified in the [MojoResult]
-  /// class. In particular, a successful operation returns [MojoResult.kOk].
+  /// Returns an integer, encoding the result as specified in [MojoConstants].
+  /// In particular, a successful operation returns [MojoConstants.kOk].
   ///
   /// Notifies the HandleWatcherIsolate that a handle it is
   /// watching should be removed from its set and closed.
@@ -63,8 +63,8 @@ class MojoHandleWatcher {
 
   /// Starts watching for events on the given [handleToken].
   ///
-  /// Returns an integer, encoding the result as specified in the [MojoResult]
-  /// class. In particular, a successful operation returns [MojoResult.kOk].
+  /// Returns an integer, encoding the result as specified in [MojoConstants].
+  /// In particular, a successful operation returns [MojoConstants.kOk].
   ///
   /// Instructs the MojoHandleWatcher isolate to add [handleToken] to the set of
   /// handles it watches, and to notify the calling isolate only for the events
@@ -75,8 +75,9 @@ class MojoHandleWatcher {
   /// The [handleToken] is a token that identifies the Mojo handle.
   ///
   /// The filtering [signals] are encoded as specified in the
-  /// [MojoHandleSignals] class. For example, setting [signals] to
-  /// [MojoHandleSignals.kPeerClosedReadable] instructs the handle watcher to
+  /// [MojoConstants] class (section "Handle Signals"). For example, setting
+  /// [signals] to the bitwise union of [MojoConstants.kPeerClosed]
+  /// [MojoConstants.kReadable] instructs the handle watcher to
   /// notify the caller, when the handle becomes readable (that is, has data
   /// available for reading), or when it is closed.
   static int add(int handleToken, SendPort port, int signals) {
@@ -85,8 +86,8 @@ class MojoHandleWatcher {
 
   /// Stops watching the given [handleToken].
   ///
-  /// Returns an integer, encoding the result as specified in the [MojoResult]
-  /// class. In particular, a successful operation returns [MojoResult.kOk].
+  /// Returns an integer, encoding the result as specified in [MojoConstants].
+  /// In particular, a successful operation returns [MojoConstants.kOk].
   ///
   /// Instructs the MojoHandleWatcher isolate to remove [handleToken] from the
   /// set of handles it watches. This allows the application isolate
@@ -99,8 +100,8 @@ class MojoHandleWatcher {
 
   /// Requests a notification on the given [port] at [deadline].
   ///
-  /// Returns an integer, encoding the result as specified in the [MojoResult]
-  /// class. In particular, a successful operation returns [MojoResult.kOk].
+  /// Returns an integer, encoding the result as specified in [MojoConstants].
+  /// In particular, a successful operation returns [MojoConstants.kOk].
   ///
   /// The [deadline] is in milliseconds, with
   /// [MojoCoreNatives.timerMillisecondClock] as reference.