Use metadata annotation @patch for patch classes

runtime/lib/isolate_patch.dart

Index: runtime/lib/isolate_patch.dart
diff --git a/runtime/lib/isolate_patch.dart b/runtime/lib/isolate_patch.dart
index 4dd89c0e7ca70bedc2d2d9f79cdd67c8bd777610..6ea2ef50fbf26b97cc72d9a8331643539b468dfe 100644
--- a/runtime/lib/isolate_patch.dart
+++ b/runtime/lib/isolate_patch.dart
@@ -5,15 +5,15 @@
 import "dart:collection" show HashMap;
 import "dart:_internal";
 
-patch class ReceivePort {
-  /* patch */ factory ReceivePort() = _ReceivePortImpl;
+@patch class ReceivePort {
+  /* @patch */ factory ReceivePort() = _ReceivePortImpl;
 
-  /* patch */ factory ReceivePort.fromRawReceivePort(RawReceivePort rawPort) =
+  /* @patch */ factory ReceivePort.fromRawReceivePort(RawReceivePort rawPort) =
       _ReceivePortImpl.fromRawReceivePort;
 }
 
-patch class Capability {
-  /* patch */ factory Capability() = _CapabilityImpl;
+@patch class Capability {
+  /* @patch */ factory Capability() = _CapabilityImpl;
 }
 
 class _CapabilityImpl implements Capability {
@@ -31,7 +31,7 @@ class _CapabilityImpl implements Capability {
   _get_hashcode() native "CapabilityImpl_get_hashcode";
 }
 
-patch class RawReceivePort {
+@patch class RawReceivePort {
   /**
    * Opens a long-lived port for receiving messages.
    *
@@ -39,7 +39,7 @@ patch class RawReceivePort {
    * can not be paused. The data-handler must be set before the first
    * event is received.
    */
-  /* patch */ factory RawReceivePort([void handler(event)]) {
+  /* @patch */ factory RawReceivePort([void handler(event)]) {
     _RawReceivePortImpl result = new _RawReceivePortImpl();
     result.handler = handler;
     return result;
@@ -268,13 +268,13 @@ void _startIsolate(SendPort parentPort,
   port.sendPort.send(null);
 }
 
-patch class Isolate {
+@patch class Isolate {
   static final _currentIsolate = _getCurrentIsolate();
   static final _rootUri = _getCurrentRootUri();
 
-  /* patch */ static Isolate get current => _currentIsolate;
+  /* @patch */ static Isolate get current => _currentIsolate;
 
-  /* patch */ static Future<Uri> get packageRoot {
+  /* @patch */ static Future<Uri> get packageRoot {
     var hook = VMLibraryHooks.packageRootUriFuture;
     if (hook == null) {
       throw new UnsupportedError("Isolate.packageRoot");
@@ -282,7 +282,7 @@ patch class Isolate {
     return hook();
   }
 
-  /* patch */ static Future<Uri> get packageConfig {
+  /* @patch */ static Future<Uri> get packageConfig {
     var hook = VMLibraryHooks.packageConfigUriFuture;
     if (hook == null) {
       throw new UnsupportedError("Isolate.packageConfig");
@@ -290,7 +290,7 @@ patch class Isolate {
     return hook();
   }
 
-  /* patch */ static Future<Uri> resolvePackageUri(Uri packageUri) {
+  /* @patch */ static Future<Uri> resolvePackageUri(Uri packageUri) {
     var hook = VMLibraryHooks.resolvePackageUriFuture;
     if (hook == null) {
       throw new UnsupportedError("Isolate.resolvePackageUri");
@@ -303,7 +303,7 @@ patch class Isolate {
       (VMLibraryHooks.packageConfigUriFuture != null) &&
       (VMLibraryHooks.resolvePackageUriFuture != null);
 
-  /* patch */ static Future<Isolate> spawn(
+  /* @patch */ static Future<Isolate> spawn(
       void entryPoint(message), var message,
       {bool paused: false, bool errorsAreFatal,
        SendPort onExit, SendPort onError}) async {
@@ -340,7 +340,7 @@ patch class Isolate {
     }
   }
 
-  /* patch */ static Future<Isolate> spawnUri(
+  /* @patch */ static Future<Isolate> spawnUri(
       Uri uri, List<String> args, var message,
       {bool paused: false,
        SendPort onExit,
@@ -478,7 +478,7 @@ patch class Isolate {
 
   static void _sendOOB(port, msg) native "Isolate_sendOOB";
 
-  /* patch */ void _pause(Capability resumeCapability) {
+  /* @patch */ void _pause(Capability resumeCapability) {
     var msg = new List(4)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _PAUSE
@@ -487,7 +487,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void resume(Capability resumeCapability) {
+  /* @patch */ void resume(Capability resumeCapability) {
     var msg = new List(4)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _RESUME
@@ -496,7 +496,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void addOnExitListener(SendPort responsePort,
+  /* @patch */ void addOnExitListener(SendPort responsePort,
                                      {Object response}) {
     var msg = new List(4)
         ..[0] = 0  // Make room for OOB message type.
@@ -506,7 +506,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void removeOnExitListener(SendPort responsePort) {
+  /* @patch */ void removeOnExitListener(SendPort responsePort) {
     var msg = new List(3)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _DEL_EXIT
@@ -514,7 +514,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void setErrorsFatal(bool errorsAreFatal) {
+  /* @patch */ void setErrorsFatal(bool errorsAreFatal) {
     var msg = new List(4)
       ..[0] = 0  // Make room for OOB message type.
       ..[1] = _ERROR_FATAL
@@ -523,7 +523,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void kill({int priority: BEFORE_NEXT_EVENT}) {
+  /* @patch */ void kill({int priority: BEFORE_NEXT_EVENT}) {
     var msg = new List(4)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _KILL
@@ -532,7 +532,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void ping(SendPort responsePort, {Object response,
+  /* @patch */ void ping(SendPort responsePort, {Object response,
                                                 int priority: IMMEDIATE}) {
     var msg = new List(5)
         ..[0] = 0  // Make room for OOM message type.
@@ -543,7 +543,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void addErrorListener(SendPort port) {
+  /* @patch */ void addErrorListener(SendPort port) {
     var msg = new List(3)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _ADD_ERROR
@@ -551,7 +551,7 @@ patch class Isolate {
     _sendOOB(controlPort, msg);
   }
 
-  /* patch */ void removeErrorListener(SendPort port) {
+  /* @patch */ void removeErrorListener(SendPort port) {
     var msg = new List(3)
         ..[0] = 0  // Make room for OOB message type.
         ..[1] = _DEL_ERROR