[headless] Remove default browser context.

headless/lib/browser/headless_browser_context_options.cc

Index: headless/lib/browser/headless_browser_context_options.cc
diff --git a/headless/lib/browser/headless_browser_context_options.cc b/headless/lib/browser/headless_browser_context_options.cc
new file mode 100644
index 0000000000000000000000000000000000000000..822b6e392753e99d5573fa95f264835d9a9c551d
--- /dev/null
+++ b/headless/lib/browser/headless_browser_context_options.cc
@@ -0,0 +1,64 @@
+// 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.
+
+#include "headless/lib/browser/headless_browser_context_options.h"
+
+#include <string>
+#include <utility>
+
+namespace headless {
+
+namespace {
+
+template <class T>
+const T& ReturnOverridenValue(const base::Optional<T>& value,
+                              const T& default_value) {
+  if (value) {
+    return *value;
+  } else {
+    return default_value;
+  }
+}
+
+}  // namespace
+
+HeadlessBrowserContextOptions::HeadlessBrowserContextOptions(
+    HeadlessBrowserContextOptions&& options) = default;
+
+HeadlessBrowserContextOptions::~HeadlessBrowserContextOptions() = default;
+
+HeadlessBrowserContextOptions& HeadlessBrowserContextOptions::operator=(
+    HeadlessBrowserContextOptions&& options) = default;
+
+HeadlessBrowserContextOptions::HeadlessBrowserContextOptions(
+    HeadlessBrowser::Options* options)
+    : browser_options_(options) {}
+
+const std::string& HeadlessBrowserContextOptions::user_agent() const {
+  return ReturnOverridenValue(user_agent_, browser_options_->user_agent);
+}
+
+const net::HostPortPair& HeadlessBrowserContextOptions::proxy_server() const {
+  return ReturnOverridenValue(proxy_server_, browser_options_->proxy_server);
+}
+
+const std::string& HeadlessBrowserContextOptions::host_resolver_rules() const {
+  return ReturnOverridenValue(host_resolver_rules_,
+                              browser_options_->host_resolver_rules);
+}
+
+const base::FilePath& HeadlessBrowserContextOptions::user_data_dir() const {
+  return ReturnOverridenValue(user_data_dir_, browser_options_->user_data_dir);
+}
+
+const ProtocolHandlerMap& HeadlessBrowserContextOptions::protocol_handlers()
+    const {
+  return protocol_handlers_;
+}
+
+ProtocolHandlerMap HeadlessBrowserContextOptions::TakeProtocolHandlers() {
+  return std::move(protocol_handlers_);
+}
+
+}  // namespace headless