Remove dead code from native mirrors library.

runtime/lib/mirrors.cc

Index: runtime/lib/mirrors.cc
diff --git a/runtime/lib/mirrors.cc b/runtime/lib/mirrors.cc
index c3d41173abe52333f770705303d5dd055a4bf9ac..f9a1dcfe72601c6914be68b8b67fe7fb1a8efcd5 100644
--- a/runtime/lib/mirrors.cc
+++ b/runtime/lib/mirrors.cc
@@ -85,33 +85,6 @@ static Dart_Handle MirrorLib() {
 }
 
 
-static Dart_Handle IsMethodMirror(Dart_Handle object, bool* is_mirror) {
-  Dart_Handle cls_name = NewString("MethodMirror");
-  Dart_Handle type = Dart_GetType(MirrorLib(), cls_name, 0, NULL);
-  if (Dart_IsError(type)) {
-    return type;
-  }
-  Dart_Handle result = Dart_ObjectIsType(object, type, is_mirror);
-  if (Dart_IsError(result)) {
-    return result;
-  }
-  return Dart_True();  // Indicates success.  Result is in is_mirror.
-}
-
-static Dart_Handle IsVariableMirror(Dart_Handle object, bool* is_mirror) {
-  Dart_Handle cls_name = NewString("VariableMirror");
-  Dart_Handle type = Dart_GetType(MirrorLib(), cls_name, 0, NULL);
-  if (Dart_IsError(type)) {
-    return type;
-  }
-  Dart_Handle result = Dart_ObjectIsType(object, type, is_mirror);
-  if (Dart_IsError(result)) {
-    return result;
-  }
-  return Dart_True();  // Indicates success.  Result is in is_mirror.
-}
-
-
 // TODO(11742): Remove once there are no more users of the Dart_Handle-based
 // VMReferences.
 static Dart_Handle CreateMirrorReference(Dart_Handle handle) {
@@ -124,114 +97,6 @@ static Dart_Handle CreateMirrorReference(Dart_Handle handle) {
 }
 
 
-static Dart_Handle StringFromSymbol(Dart_Handle symbol) {
-  Dart_Handle result = Dart_Invoke(MirrorLib(), NewString("_n"), 1, &symbol);
-  return result;
-}
-
-
-static Dart_Handle UnwrapVMReference(Dart_Handle vm_ref) {
-  // Retrieve the persistent handle from the VMReference
-  intptr_t perm_handle_value = 0;
-  Dart_Handle result =
-      Dart_GetNativeInstanceField(vm_ref, 0, &perm_handle_value);
-  if (Dart_IsError(result)) {
-    return result;
-  }
-  Dart_PersistentHandle perm_handle =
-      reinterpret_cast<Dart_PersistentHandle>(perm_handle_value);
-  ASSERT(perm_handle != NULL);
-  Dart_Handle handle = Dart_HandleFromPersistent(perm_handle);
-  ASSERT(handle != NULL);
-  ASSERT(!Dart_IsError(handle));
-  return handle;
-}
-
-static Dart_Handle UnwrapMirror(Dart_Handle mirror);
-
-static Dart_Handle UnwrapObjectMirror(Dart_Handle mirror) {
-  Dart_Handle field_name = NewString("_reference");
-  Dart_Handle vm_ref = Dart_GetField(mirror, field_name);
-  if (Dart_IsError(vm_ref)) {
-    return vm_ref;
-  }
-  return UnwrapVMReference(vm_ref);
-}
-
-
-static Dart_Handle UnwrapMethodMirror(Dart_Handle methodMirror) {
-  Dart_Handle namefield_name = NewString("simpleName");
-  Dart_Handle name_ref = Dart_GetField(methodMirror, namefield_name);
-  if (Dart_IsError(name_ref)) {
-    return name_ref;
-  }
-  Dart_Handle ownerfield_name = NewString("_owner");
-  Dart_Handle owner_mirror = Dart_GetField(methodMirror, ownerfield_name);
-  if (Dart_IsError(owner_mirror)) {
-    return owner_mirror;
-  }
-  Dart_Handle owner = UnwrapMirror(owner_mirror);
-  if (Dart_IsError(owner)) {
-    return owner;
-  }
-  Dart_Handle func = Dart_LookupFunction(owner, StringFromSymbol(name_ref));
-  if (Dart_IsError(func)) {
-    return func;
-  }
-  ASSERT(!Dart_IsNull(func));
-  return func;
-}
-
-static Dart_Handle UnwrapVariableMirror(Dart_Handle variableMirror) {
-  Dart_Handle namefield_name = NewString("simpleName");
-  Dart_Handle name_ref = Dart_GetField(variableMirror, namefield_name);
-  if (Dart_IsError(name_ref)) {
-    return name_ref;
-  }
-  Dart_Handle ownerfield_name = NewString("_owner");
-  Dart_Handle owner_mirror = Dart_GetField(variableMirror, ownerfield_name);
-  ASSERT(!Dart_IsNull(owner_mirror));
-  if (Dart_IsError(owner_mirror)) {
-    return owner_mirror;
-  }
-  Dart_Handle owner = UnwrapMirror(owner_mirror);
-  if (Dart_IsError(owner)) {
-    return owner;
-  }
-  Dart_Handle variable =
-  Dart_LookupVariable(owner, StringFromSymbol(name_ref));
-  if (Dart_IsError(variable)) {
-    return variable;
-  }
-  ASSERT(!Dart_IsNull(variable));
-  return variable;
-}
-
-static Dart_Handle UnwrapMirror(Dart_Handle mirror) {
-  // Caveat Emptor:
-  // only works for ObjectMirrors, VariableMirrors and MethodMirrors
-  // and their subtypes
-  bool is_method_mirror = false;
-  Dart_Handle result = IsMethodMirror(mirror, &is_method_mirror);
-  if (Dart_IsError(result)) {
-    return result;
-  }
-  if (is_method_mirror) {
-    return UnwrapMethodMirror(mirror);
-  }
-  bool is_variable_mirror = false;
-  result = IsVariableMirror(mirror, &is_variable_mirror);
-  if (Dart_IsError(result)) {
-    return result;
-  }
-  if (is_variable_mirror) {
-    return UnwrapVariableMirror(mirror);
-  }
-  return UnwrapObjectMirror(mirror);
-  // will return nonsense if mirror is not an ObjectMirror
-}
-
-
 static Dart_Handle CreateLazyMirror(Dart_Handle target);