Add 'dart:debugger' library

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 4233887315ad228d2907d2a8e12e302c346ab23f..cdf5821c6b1d4fd0b6f1d075b9ae3454ef22ca64 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -3048,13 +3048,14 @@ class Library : public Object {
   static RawLibrary* ConvertLibrary();
   static RawLibrary* CoreLibrary();
   static RawLibrary* CollectionLibrary();
+  static RawLibrary* DebuggerLibrary();
   static RawLibrary* InternalLibrary();
   static RawLibrary* IsolateLibrary();
   static RawLibrary* MathLibrary();
   static RawLibrary* MirrorsLibrary();
   static RawLibrary* NativeWrappersLibrary();
-  static RawLibrary* TypedDataLibrary();
   static RawLibrary* ProfilerLibrary();
+  static RawLibrary* TypedDataLibrary();
 
   // Eagerly compile all classes and functions in the library.
   static RawError* CompileAll();