[api] Prototype WeakRef implementation

src/inspector/v8-injected-script-host.cc

 // Copyright 2015 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.
 
 #include "src/inspector/v8-injected-script-host.h"
 
 #include "src/base/macros.h"
 #include "src/inspector/injected-script-native.h"
 #include "src/inspector/string-util.h"
 #include "src/inspector/v8-debugger.h"
@@ skipping 181 matching lines @@
     return;
   }
   if (value->IsSet()) {
     info.GetReturnValue().Set(toV8StringInternalized(isolate, "set"));
     return;
   }
   if (value->IsWeakSet()) {
     info.GetReturnValue().Set(toV8StringInternalized(isolate, "weakset"));
     return;
   }
+  if (value->IsWeakRef()) {
+    info.GetReturnValue().Set(toV8StringInternalized(isolate, "weakref"));
+    return;
+  }
   if (value->IsMapIterator() || value->IsSetIterator()) {
     info.GetReturnValue().Set(toV8StringInternalized(isolate, "iterator"));
     return;
   }
   if (value->IsGeneratorObject()) {
     info.GetReturnValue().Set(toV8StringInternalized(isolate, "generator"));
     return;
   }
   if (value->IsNativeError()) {
     info.GetReturnValue().Set(toV8StringInternalized(isolate, "error"));
@@ skipping 116 matching lines @@
     UNREACHABLE();
     return;
   }
   v8::Local<v8::Object> target = info[0].As<v8::Proxy>();
   while (target->IsProxy())
     target = v8::Local<v8::Proxy>::Cast(target)->GetTarget();
   info.GetReturnValue().Set(target);
 }
 
 }  // namespace v8_inspector