Improve class-tree, class-view, and instance-view.

runtime/vm/service/service.md

Index: runtime/vm/service/service.md
diff --git a/runtime/vm/service/service.md b/runtime/vm/service/service.md
index 7e6c7f0ac2670fb66b3d9971f9aba04752881528..68d134f0d7b26bbbaa5d7dda39b693dcccdef277 100644
--- a/runtime/vm/service/service.md
+++ b/runtime/vm/service/service.md
@@ -971,11 +971,21 @@ class Class extends Object {
   // The superclass of this class, if any.
   @Class super [optional];
 
-  // A list of interface types for this class.
+  // The supertype for this class, if any.
   //
   // The value will be of the kind: Type.
+  @Instance superType [optional];
+
+  // A list of interface types for this class.
+  //
+  // The values will be of the kind: Type.
   @Instance[] interfaces;
 
+  // The mixin type for this class, if any.
+  //
+  // The value will be of the kind: Type.
+  @Instance mixin [optional];
+
   // A list of fields in this class. Does not include fields from
   // superclasses.
   @Field[] fields;
@@ -2508,5 +2518,5 @@ version | comments
 3.1 | Add the getSourceReport RPC.  The getObject RPC now accepts offset and count for string objects.  String objects now contain length, offset, and count properties.
 3.2 | Isolate objects now include the runnable bit and many debugger related RPCs will return an error if executed on an isolate before it is runnable.
 3.3 | Pause event now indicates if the isolate is paused at an await, yield, or yield* suspension point via the 'atAsyncSuspension' field. Resume command now supports the step parameter 'OverAsyncSuspension'. A Breakpoint added synthetically by an 'OverAsyncSuspension' resume command identifies itself as such via the 'isSyntheticAsyncContinuation' field.
-
+3.4 | Add the superType and mixin fields to Class.
 [discuss-list]: https://groups.google.com/a/dartlang.org/forum/#!forum/observatory-discuss