Add TestWebContentsFactory to content/public/test

content/test/test_web_contents_factory.cc

+// Copyright 2015 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/public/test/test_web_contents_factory.h"
+
+#include "base/run_loop.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/test/test_renderer_host.h"
+#include "content/public/test/web_contents_tester.h"
+
+#if defined(USE_AURA)
+#include "ui/aura/env.h"
+#endif
+
+namespace content {
+
+TestWebContentsFactory::TestWebContentsFactory()
+    : rvh_enabler_(new content::RenderViewHostTestEnabler()),
+      tear_down_aura_(false) {
+#if defined(USE_AURA)
+  if (!aura::Env::HasInstanceForTesting()) {
+    aura::Env::CreateInstance(true);
+    tear_down_aura_ = true;
+  }
+#endif
+}
+
+TestWebContentsFactory::~TestWebContentsFactory() {
+  web_contents_.clear();

[sky, 2015/02/28 17:30:45]

Document why you need to explicitly clear here.

[Devlin, 2015/03/02 17:27:12]

Done.

+  // Let any posted tasks for web contents deletion run.
+  base::RunLoop().RunUntilIdle();
+  rvh_enabler_.reset();
+  // Let any posted tasks for RenderProcess/ViewHost deletion run.
+  base::RunLoop().RunUntilIdle();
+#if defined(USE_AURA)
+  if (tear_down_aura_)
+    aura::Env::DeleteInstance();
+#endif
+}
+
+WebContents* TestWebContentsFactory::CreateWebContents(
+    BrowserContext* context) {
+  web_contents_.push_back(
+      WebContentsTester::CreateTestWebContents(context, nullptr));
+  DCHECK(web_contents_.back());
+  return web_contents_.back();
+}
+
+}  // namespace content