headless: Introduce a browser context

headless/public/headless_browser_context.h

Index: headless/public/headless_browser_context.h
diff --git a/headless/public/headless_browser_context.h b/headless/public/headless_browser_context.h
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+++ b/headless/public/headless_browser_context.h
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+// 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 HEADLESS_PUBLIC_HEADLESS_BROWSER_CONTEXT_H_
+#define HEADLESS_PUBLIC_HEADLESS_BROWSER_CONTEXT_H_
+
+#include "headless/public/headless_export.h"
+
+namespace headless {
+class HeadlessBrowserImpl;
+
+// Represents an isolated session with a unique cache, cookies, and other
+// profile/session related data.
+class HEADLESS_EXPORT HeadlessBrowserContext {
+ public:
+  class Builder;
+
+  virtual ~HeadlessBrowserContext() {}
+
+  // TODO(skyostil): Allow saving and restoring contexts (crbug.com/617931).
+
+ protected:
+  HeadlessBrowserContext() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserContext);
+};
+
+class HEADLESS_EXPORT HeadlessBrowserContext::Builder {
+ public:
+  Builder(Builder&&);
+  ~Builder();
+
+  // TODO(skyostil): Allow overriding protocol handlers.
+
+  std::unique_ptr<HeadlessBrowserContext> Build();
+
+ private:
+  friend class HeadlessBrowserImpl;
+
+  explicit Builder(HeadlessBrowserImpl* browser);
+
+  HeadlessBrowserImpl* browser_;
+
+  DISALLOW_COPY_AND_ASSIGN(Builder);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_PUBLIC_HEADLESS_BROWSER_CONTEXT_H_