[headless] Remove default browser context.

headless/lib/browser/headless_browser_context_options.h

Index: headless/lib/browser/headless_browser_context_options.h
diff --git a/headless/lib/browser/headless_browser_context_options.h b/headless/lib/browser/headless_browser_context_options.h
new file mode 100644
index 0000000000000000000000000000000000000000..a3f97eac9ed0868f1a3cf27f39ed1c5c66b2d9c8
--- /dev/null
+++ b/headless/lib/browser/headless_browser_context_options.h
@@ -0,0 +1,67 @@
+// 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_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_OPTIONS_H_
+#define HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_OPTIONS_H_
+
+#include <string>
+
+#include "base/files/file_path.h"
+#include "base/optional.h"
+#include "headless/public/headless_browser.h"
+#include "headless/public/headless_browser_context.h"
+
+namespace headless {
+
+// Represents options which can be customized for a given BrowserContext.
+// Provides a fallback to default browser-side options when an option
+// is not set for a particular BrowserContext.
+class HeadlessBrowserContextOptions {
+ public:
+  HeadlessBrowserContextOptions(HeadlessBrowserContextOptions&& options);
+  ~HeadlessBrowserContextOptions();
+
+  HeadlessBrowserContextOptions& operator=(
+      HeadlessBrowserContextOptions&& options);
+
+  const std::string& user_agent() const;
+
+  // See HeadlessBrowser::Options::proxy_server.
+  const net::HostPortPair& proxy_server() const;
+
+  // See HeadlessBrowser::Options::host_resolver_rules.
+  const std::string& host_resolver_rules() const;
+
+  const gfx::Size& window_size() const;
+
+  // See HeadlessBrowser::Options::user_data_dir.
+  const base::FilePath& user_data_dir() const;
+
+  // Custom network protocol handlers. These can be used to override URL
+  // fetching for different network schemes.
+  const ProtocolHandlerMap& protocol_handlers() const;
+  // Since ProtocolHandlerMap is move-only, this method takes ownership of them.
+  ProtocolHandlerMap TakeProtocolHandlers();
+
+ private:
+  friend class HeadlessBrowserContext::Builder;
+
+  explicit HeadlessBrowserContextOptions(HeadlessBrowser::Options*);
+
+  HeadlessBrowser::Options* browser_options_;
+
+  base::Optional<std::string> user_agent_;
+  base::Optional<net::HostPortPair> proxy_server_;
+  base::Optional<std::string> host_resolver_rules_;
+  base::Optional<gfx::Size> window_size_;
+  base::Optional<base::FilePath> user_data_dir_;
+
+  ProtocolHandlerMap protocol_handlers_;
+
+  DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserContextOptions);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_CONTEXT_OPTIONS_H_