Fixes handling of short reads/writes for Mac SSL

sdk/lib/io/secure_socket.dart

Index: sdk/lib/io/secure_socket.dart
diff --git a/sdk/lib/io/secure_socket.dart b/sdk/lib/io/secure_socket.dart
index c271d77794f12673e56372aed54a7ba0279b3739..07ef23ea1482b1a0ce80bda09b8fe706001193b4 100644
--- a/sdk/lib/io/secure_socket.dart
+++ b/sdk/lib/io/secure_socket.dart
@@ -842,7 +842,9 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
   }
 
   void _tryFilter() {
-    if (_status == CLOSED) return;
+    if (_status == CLOSED) {
+      return;
+    }
     if (_filterPending && !_filterActive) {
       _filterActive = true;
       _filterPending = false;
@@ -858,7 +860,9 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
         if (_filterStatus.writeEmpty && _closedWrite && !_socketClosedWrite) {
           // Checks for and handles all cases of partially closed sockets.
           shutdown(SocketDirection.SEND);
-          if (_status == CLOSED) return;
+          if (_status == CLOSED) {
+            return;
+          }
         }
         if (_filterStatus.readEmpty && _socketClosedRead && !_closedRead) {
           if (_status == HANDSHAKE) {
@@ -870,14 +874,26 @@ class _RawSecureSocket extends Stream<RawSocketEvent>
           }
           _closeHandler();
         }
-        if (_status == CLOSED) return;
+        if (_status == CLOSED) {
+          return;
+        }
         if (_filterStatus.progress) {
           _filterPending = true;
-          if (_filterStatus.writePlaintextNoLongerFull) _sendWriteEvent();
-          if (_filterStatus.readEncryptedNoLongerFull) _readSocket();
-          if (_filterStatus.writeEncryptedNoLongerEmpty) _writeSocket();
-          if (_filterStatus.readPlaintextNoLongerEmpty) _scheduleReadEvent();
-          if (_status == HANDSHAKE) _secureHandshake();
+          if (_filterStatus.writeEncryptedNoLongerEmpty) {
+            _writeSocket();
+          }
+          if (_filterStatus.writePlaintextNoLongerFull) {
+            _sendWriteEvent();
+          }
+          if (_filterStatus.readEncryptedNoLongerFull) {
+            _readSocket();
+          }
+          if (_filterStatus.readPlaintextNoLongerEmpty) {
+            _scheduleReadEvent();
+          }
+          if (_status == HANDSHAKE) {
+            _secureHandshake();
+          }
         }
         _tryFilter();
       }).catchError(_reportError);