Implement test runner AX API to show context menu.

content/shell/renderer/test_runner/web_ax_object_proxy.cc

 // Copyright 2014 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.
 
 #include "content/shell/renderer/test_runner/web_ax_object_proxy.h"
 
 #include "base/strings/stringprintf.h"
 #include "gin/handle.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
@@ skipping 1046 matching lines @@
   accessibility_object_.updateLayoutAndCheckValidity();
   accessibility_object_.increment();
 }
 
 void WebAXObjectProxy::Decrement() {
   accessibility_object_.updateLayoutAndCheckValidity();
   accessibility_object_.decrement();
 }
 
 void WebAXObjectProxy::ShowMenu() {
+  accessibility_object_.showContextMenu();
 }
 
 void WebAXObjectProxy::Press() {
   accessibility_object_.updateLayoutAndCheckValidity();
   accessibility_object_.press();
 }
 
 bool WebAXObjectProxy::IsEqual(v8::Handle<v8::Object> proxy) {
   WebAXObjectProxy* unwrapped_proxy = NULL;
   if (!gin::ConvertFromV8(blink::mainThreadIsolate(), proxy, &unwrapped_proxy))
@@ skipping 127 matching lines @@
   v8::Handle<v8::Value> value_handle = gin::CreateHandle(
       isolate, new RootWebAXObjectProxy(object, this)).ToV8();
   if (value_handle.IsEmpty())
     return v8::Handle<v8::Object>();
   v8::Handle<v8::Object> handle = value_handle->ToObject(isolate);
   elements_.Append(handle);
   return handle;
 }
 
 }  // namespace content