- Remove the legacy debug protocol.

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index b6b76b31ad3e9ec3895404b40d384889f145a543..95068b7c7b755c22b423bdc2d0f44fab5dea33a9 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -430,21 +430,6 @@ class Isolate : public BaseIsolate {
     return create_callback_;
   }
 
-  static void SetInterruptCallback(Dart_IsolateInterruptCallback cb) {
-    interrupt_callback_ = cb;
-  }
-  static Dart_IsolateInterruptCallback InterruptCallback() {
-    return interrupt_callback_;
-  }
-
-  static void SetUnhandledExceptionCallback(
-      Dart_IsolateUnhandledExceptionCallback cb) {
-    unhandled_exception_callback_ = cb;
-  }
-  static Dart_IsolateUnhandledExceptionCallback UnhandledExceptionCallback() {
-    return unhandled_exception_callback_;
-  }
-
   static void SetShutdownCallback(Dart_IsolateShutdownCallback cb) {
     shutdown_callback_ = cb;
   }
@@ -849,8 +834,6 @@ class Isolate : public BaseIsolate {
 #undef ISOLATE_TIMELINE_STREAM_VARIABLE
 
   static Dart_IsolateCreateCallback create_callback_;
-  static Dart_IsolateInterruptCallback interrupt_callback_;
-  static Dart_IsolateUnhandledExceptionCallback unhandled_exception_callback_;
   static Dart_IsolateShutdownCallback shutdown_callback_;
   static Dart_FileOpenCallback file_open_callback_;
   static Dart_FileReadCallback file_read_callback_;