[inspector] Increased chances of successful InjectedScriptSource compilation

src/inspector/injected_script_externs.js

Index: src/inspector/injected_script_externs.js
diff --git a/src/inspector/injected_script_externs.js b/src/inspector/injected_script_externs.js
index b6339c6eb086675e2f3742e951e3811a2aa4f7df..14b14e6bbf8c89969ffb7cda1fe6c3bf5e4d4446 100644
--- a/src/inspector/injected_script_externs.js
+++ b/src/inspector/injected_script_externs.js
@@ -9,6 +9,11 @@ function InjectedScriptHostClass()
 
 /**
  * @param {*} obj
+ */
+InjectedScriptHostClass.prototype.nullifyPrototype = function(obj) {}
+
+/**
+ * @param {*} obj
  * @return {string}
  */
 InjectedScriptHostClass.prototype.internalConstructorName = function(obj) {}