Add TestWebContentsFactory to content/public/test

content/public/test/test_web_contents_factory.h

Index: content/public/test/test_web_contents_factory.h
diff --git a/content/public/test/test_web_contents_factory.h b/content/public/test/test_web_contents_factory.h
new file mode 100644
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+++ b/content/public/test/test_web_contents_factory.h
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+// 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.
+
+#ifndef CONTENT_PUBLIC_TEST_TEST_WEB_CONTENTS_FACTORY_H_
+#define CONTENT_PUBLIC_TEST_TEST_WEB_CONTENTS_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+
+namespace content {
+class BrowserContext;
+class RenderViewHostTestEnabler;
+class WebContents;
+
+// A helper class to create test web contents (tabs) for unit tests, without
+// inheriting from RenderViewTestHarness. Can create web contents, and will
+// clean up after itself upon destruction. Owns all created web contents.
+// A few notes:
+// - Works well allocated on the stack, because it should be destroyed before
+//   associated browser context.
+// - Doesn't play nice with web contents created any other way (because of
+//   the implementation of RenderViewHostTestEnabler). But if you are creating
+//   web contents already, what do you need this for? ;)
+// TODO(devlin): The API is currently a bit sparse; there may need to be methods
+// to, e.g., delete/close a web contents, access existing web contents, etc.
+// These can be added as-needed.
+class TestWebContentsFactory {
+ public:
+  TestWebContentsFactory();
+  ~TestWebContentsFactory();
+
+  // Creates a new WebContents with the given |context|, and returns it.
+  // Ownership remains with the TestWebContentsFactory.
+  WebContents* CreateWebContents(BrowserContext* context);
+
+ private:
+  // The test factory (and friends) for creating test web contents.
+  scoped_ptr<RenderViewHostTestEnabler> rvh_enabler_;
+
+  // The vector of web contents that this class created.
+  ScopedVector<WebContents> web_contents_;
+
+  // True if the factory initialized aura (and should thus tear it down).
+  bool tear_down_aura_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestWebContentsFactory);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_TEST_TEST_WEB_CONTENTS_FACTORY_H_