[builtins] Move EncodeURI from runtime to builtins.

src/uri.h

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_URI_H_
+#define V8_URI_H_
+
+#include "src/allocation.h"
+#include "src/objects.h"
+
+namespace v8 {
+namespace internal {
+
+class Uri : public AllStatic {
+ public:
+  static Object* EncodeUri(Isolate* isolate, Handle<String> uri) {
+    return Encode(isolate, uri, true);
+  }
+
+  static Object* EncodeUriComponent(Isolate* isolate,
+                                    Handle<String> component) {
+    return Encode(isolate, component, false);
+  }
+
+  // DecodeUri
+  // DecodeUriComponent
+  // escape
+  // unescape
+
+ private:
+  static Object* Encode(Isolate* isolate, Handle<String> uri, bool is_uri);
+  // decode
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_URI_H_