Register and select printer on click.

chrome/browser/ui/webui/print_preview/printer_capabilities.h

Index: chrome/browser/ui/webui/print_preview/printer_capabilities.h
diff --git a/chrome/browser/ui/webui/print_preview/printer_capabilities.h b/chrome/browser/ui/webui/print_preview/printer_capabilities.h
new file mode 100644
index 0000000000000000000000000000000000000000..fcd8bdb57b7fea0b0a543c825ea5a664fcf7d06c
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+++ b/chrome/browser/ui/webui/print_preview/printer_capabilities.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 CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINTER_CAPABILITIES_H_
+#define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINTER_CAPABILITIES_H_
+
+#include <memory>
+#include <string>
+#include <utility>
+
+#include "base/values.h"
+
+namespace printing {
+
+struct PrinterBasicInfo;
+
+// Printer capability setting keys.
+extern const char kPrinterId[];
+extern const char kPrinterCapabilities[];
+
+// Extracts the printer display name and description from the
+// appropriate fields in |printer| for the platform.
+std::pair<std::string, std::string> GetPrinterNameAndDescription(
+    const PrinterBasicInfo& printer);
+
+// Returns the JSON representing printer capabilities for the device registered
+// as |device_name| in the PrinterBackend.  The returned dictionary is suitable
+// for passage to the WebUI.
+std::unique_ptr<base::DictionaryValue> GetSettingsOnBlockingPool(
+    const std::string& device_name,
+    const PrinterBasicInfo& basic_info);
+
+}  // namespace printing
+
+#endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINTER_CAPABILITIES_H_