[Extensions Bindings] Add support for updateArgumentsPreValidate

extensions/renderer/api_binding_test_util.h

 // Copyright 2016 The Chromium 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 EXTENSIONS_RENDERER_API_BINDING_TEST_UTIL_H_
 #define EXTENSIONS_RENDERER_API_BINDING_TEST_UTIL_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 60 matching lines @@
                                          int argc,
                                          v8::Local<v8::Value> argv[]);
 
 // Like RunFunctionOnGlobal(), but doesn't return the result. This is useful
 // for binding in places a result isn't expected.
 void RunFunctionOnGlobalAndIgnoreResult(v8::Local<v8::Function> function,
                                         v8::Local<v8::Context> context,
                                         int argc,
                                         v8::Local<v8::Value> argv[]);
 
+// Like RunFunctionOnGlobal(), but returns a persistent handle for the result.
+v8::Global<v8::Value> RunFunctionOnGlobalAndReturnHandle(
+    v8::Local<v8::Function> function,
+    v8::Local<v8::Context> context,
+    int argc,
+    v8::Local<v8::Value> argv[]);
+
 // Calls the given |function| with the specified |receiver| and arguments, but
 // EXPECTs the function to throw the |expected_error|.
 void RunFunctionAndExpectError(v8::Local<v8::Function> function,
                                v8::Local<v8::Context> context,
                                v8::Local<v8::Value> receiver,
                                int argc,
                                v8::Local<v8::Value> argv[],
                                const std::string& expected_error);
 
 // Like RunFunctionAndExpectError(), but uses v8::Undefined for the receiver.
@@ skipping 17 matching lines @@
 
 // As above, but returns a JSON-serialized version of the value, or
 // "undefined", "null", "function", or "empty".
 std::string GetStringPropertyFromObject(v8::Local<v8::Object> object,
                                         v8::Local<v8::Context> context,
                                         base::StringPiece key);
 
 }  // extensions
 
 #endif  // EXTENSIONS_RENDERER_API_BINDING_TEST_UTIL_H_