Kill service_test.cc tests in favor of dart tests for the service protocol.

runtime/vm/service/service.idl

 // <h2>Connecting to the VM Service</h2>
 //
 // TODO(turnidge): Describe how to connect, etc.
 //
 // <h2>Types</h2>
 //
 // Every non-error response returned by the VM Service has the
 // <code>type</code> property.  This allows the client distinguish
 // between different kinds of responses.
 //
@@ skipping 133 matching lines @@
 
   // Returns a simple tag-based profile for an isolate.
   getTagProfile(isolateId string) TagProfile
 
   // Returns an allocation profile for an isolate.
   //
   // <code>reset</code> is optional and indicates whether allocation
   // accumulators should be reset.
   //
   // <code>gc</code> is optional and indicates whether a full
-  getAllocationProfile(isolateId string,
-                       reset bool,
-                       gc GCOption) AllocationProfile
+  _getAllocationProfile(isolateId string,
+                        reset bool,
+                        gc GCOption) AllocationProfile
 
   // Returns the heap map for an isolate.
   getHeapMap(isolateId string) HeapMap
 
   // Returns how many bytes are retained by some target Class or Instance.
-  getRetainedSize(isolateId string, targetId string) InstanceRef
+  _getRetainedSize(isolateId string, targetId string) InstanceRef
 
   // Returns a path demonstrating why an object is retained in memory.
   //
   // TODO(turnidge): Make limit an int instead of a string.
-  getRetainingPath(isolateId string,
-                   targetId string,
-                   limit int) RetainingPath
+  _getRetainingPath(isolateId string,
+                    targetId string,
+                    limit int) RetainingPath
 
   // Returns a collection of inbound references to some object.
   //
   // TODO(turnidge): Make limit an int instead of a string.
-  getInboundReferences(isolateId string,
-                       targetId string,
-                       limit int) InboundReferences
+  _getInboundReferences(isolateId string,
+                        targetId string,
+                        limit int) InboundReferences
+
+  _getInstances(isolateId string,
+                classId string,
+                limit int) InstanceSet
 
   getClassList(isolateId string) ClassList
 
   // When <code>onlyWithInstantiations</code> is true, the list only includes
   // type arguments with instantiations. Otherwise, all type arguments are
   // returned.
   getTypeArgumentsList(isolateId string,
                        onlyWithInstantiations bool) TypeArgumentsList
 
   // Gets a list of isolate metrics.
@@ skipping 858 matching lines @@
 
 
 // TODO(koda): slot can actually be a string, and integer or a
 // FieldRef.  Fix this to be consistent with RetainingPathElement.
 struct InboundReference {
   source InstanceRef
   slot   int
 }
 
 
+struct InstanceSet {
+  placeholder int
+}
+
+
 struct ClassList extends Response {
   classes []ClassRef
 }
 
 
 struct TypeArgumentsList extends Response {
   tableSize int
   tableUsed int
   typeArguments []TypeArgumentsRef
 }
@@ skipping 55 matching lines @@
 
 
 struct _EchoResponse extends Response {
   text string
 }
 
 
 struct UNDOCUMENTED {
   TODO int
 }