[inspector] Increased chances of successful InjectedScriptSource compilation

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

Index: src/inspector/v8-injected-script-host.cc
diff --git a/src/inspector/v8-injected-script-host.cc b/src/inspector/v8-injected-script-host.cc
index d3e89d9d7b8382523bbfca91ae101b663abf1a69..80c256fcb30d611f22ad7339693226d60a079420 100644
--- a/src/inspector/v8-injected-script-host.cc
+++ b/src/inspector/v8-injected-script-host.cc
@@ -55,6 +55,9 @@ v8::Local<v8::Object> V8InjectedScriptHost::create(
   USE(success);
   v8::Local<v8::External> debuggerExternal =
       v8::External::New(isolate, inspector);
+  setFunctionProperty(context, injectedScriptHost, "nullifyPrototype",
+                      V8InjectedScriptHost::nullifyPrototypeCallback,
+                      debuggerExternal);
   setFunctionProperty(context, injectedScriptHost, "internalConstructorName",
                       V8InjectedScriptHost::internalConstructorNameCallback,
                       debuggerExternal);
@@ -77,6 +80,16 @@ v8::Local<v8::Object> V8InjectedScriptHost::create(
   return injectedScriptHost;
 }
 
+void V8InjectedScriptHost::nullifyPrototypeCallback(
+    const v8::FunctionCallbackInfo<v8::Value>& info) {
+  CHECK(info.Length() == 1 && info[0]->IsObject());
+  v8::Isolate* isolate = info.GetIsolate();
+  info[0]
+      .As<v8::Object>()
+      ->SetPrototype(isolate->GetCurrentContext(), v8::Null(isolate))
+      .ToChecked();
+}
+
 void V8InjectedScriptHost::internalConstructorNameCallback(
     const v8::FunctionCallbackInfo<v8::Value>& info) {
   if (info.Length() < 1 || !info[0]->IsObject()) return;