Wholesale move sky/engine/tonic to tonic

tonic/dart_class_library.cc

Index: tonic/dart_class_library.cc
diff --git a/tonic/dart_class_library.cc b/tonic/dart_class_library.cc
new file mode 100644
index 0000000000000000000000000000000000000000..60bc51900eedb3dfa571c80b83370dfc228c32d3
--- /dev/null
+++ b/tonic/dart_class_library.cc
@@ -0,0 +1,34 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "tonic/dart_class_library.h"
+
+#include "base/logging.h"
+#include "tonic/dart_wrapper_info.h"
+
+namespace blink {
+
+DartClassLibrary::DartClassLibrary() : provider_(nullptr) {
+}
+
+DartClassLibrary::~DartClassLibrary() {
+  // Note that we don't need to delete these persistent handles because this
+  // object lives as long as the isolate. The handles will get deleted when the
+  // isolate dies.
+}
+
+Dart_PersistentHandle DartClassLibrary::GetClass(const DartWrapperInfo& info) {
+  DCHECK(provider_);
+
+  const auto& result = cache_.insert(std::make_pair(&info, nullptr));
+  if (!result.second) {
+    // Already present, return value.
+    return result.first->second;
+  }
+  Dart_Handle class_handle = provider_->GetClassByName(info.interface_name);
+  result.first->second = Dart_NewPersistentHandle(class_handle);
+  return result.first->second;
+}
+
+}  // namespace blink