Reduce boilerplace for common pattern to return MaybeHandle.

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) {
+  static MaybeHandle<String> EncodeUri(Isolate* isolate, Handle<String> uri) {
     return Encode(isolate, uri, true);
   }
 
-  static Object* EncodeUriComponent(Isolate* isolate,
-                                    Handle<String> component) {
+  static MaybeHandle<String> 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);
+  static MaybeHandle<String> Encode(Isolate* isolate, Handle<String> uri,
+                                    bool is_uri);
   // decode
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_URI_H_