Create a about handler component.

Create a about handler component.
The following files ::
  chrome/browser/net/about_protocol_handler.*
  net/url_request/url_request_about_job.*
moved to new component: components/about_handler.
Also added GYP and GN file for same.

BUG=516695

Review URL: https://codereview.chromium.org/1284173003

Cr-Commit-Position: refs/heads/master@{#343366}

1 files changed, 30 insertions, 0 deletions

diff --git a/components/about_handler/about_protocol_handler.h b/components/about_handler/about_protocol_handler.h
new file mode 100644
index 0000000..ad8adfb
--- /dev/null
+++ b/components/about_handler/about_protocol_handler.h
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 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 COMPONENTS_ABOUT_HANDLER_ABOUT_PROTOCOL_HANDLER_H_
+#define COMPONENTS_ABOUT_HANDLER_ABOUT_PROTOCOL_HANDLER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "net/url_request/url_request_job_factory.h"
+
+namespace about_handler {
+
+// Implements a ProtocolHandler for About jobs.
+class AboutProtocolHandler : public net::URLRequestJobFactory::ProtocolHandler {
+ public:
+  AboutProtocolHandler();
+  ~AboutProtocolHandler() override;
+  net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) const override;
+  bool IsSafeRedirectTarget(const GURL& location) const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AboutProtocolHandler);
+};
+
+}  // namespace about_handler
+
+#endif  // COMPONENTS_ABOUT_HANDLER_ABOUT_PROTOCOL_HANDLER_H_