Notify print preview UI if getting capabilityes failed.

chrome/browser/printing/print_system_task_proxy_unittest.cc

 // 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.
 
 #include <cups/cups.h>
 #include <cups/ppd.h>
 
 #include <cstring>
 #include <string>
 #include <vector>
@@ skipping 232 matching lines @@
       "\"<</Duplex true/Tumble true>>setpagedevice\"\n"
       "*CloseUI: *Duplex\n\n"
       "*CloseGroup: General\n");
 
   bool set_color_as_default = false;
   bool set_duplex_as_default = false;
   int printer_color_space_for_color = printing::UNKNOWN_COLOR_MODEL;
   int printer_color_space_for_black = printing::UNKNOWN_COLOR_MODEL;
   int default_duplex_setting_value = printing::UNKNOWN_DUPLEX_MODE;
 
-  bool res = PrintSystemTaskProxy::GetPrinterCapabilitiesCUPS(
+  scoped_refptr<PrintSystemTaskProxy> proxy(
+      new PrintSystemTaskProxy(base::WeakPtr<PrintPreviewHandler>(), NULL,
+                               false));
+
+  ASSERT_TRUE(proxy->ParsePrinterCapabilities(
       printer_info,
       "InvalidPrinter",
       &set_color_as_default,
       &printer_color_space_for_color,
       &printer_color_space_for_black,
       &set_duplex_as_default,
-      &default_duplex_setting_value);
-  ASSERT_TRUE(res);
+      &default_duplex_setting_value));
   EXPECT_FALSE(set_duplex_as_default);
   EXPECT_EQ(printing::SIMPLEX, default_duplex_setting_value);
 }
 
 TEST(PrintSystemTaskProxyTest, DetectNoDuplexModeCUPS) {
   // Specifies the test ppd data.
   printing::PrinterCapsAndDefaults printer_info;
   printer_info.printer_capabilities.append(
       "*PPD-Adobe: \"4.3\"\n\n"
       "*OpenGroup: General/General\n\n"
       "*CloseGroup: General\n");
 
   bool set_color_as_default = false;
   bool set_duplex_as_default = false;
   int printer_color_space_for_color = printing::UNKNOWN_COLOR_MODEL;
   int printer_color_space_for_black = printing::UNKNOWN_COLOR_MODEL;
   int default_duplex_setting_value = printing::UNKNOWN_DUPLEX_MODE;
 
-  bool res = PrintSystemTaskProxy::GetPrinterCapabilitiesCUPS(
+  scoped_refptr<PrintSystemTaskProxy> proxy(
+      new PrintSystemTaskProxy(base::WeakPtr<PrintPreviewHandler>(), NULL,
+                               false));
+
+  ASSERT_TRUE(proxy->ParsePrinterCapabilities(
       printer_info,
       "InvalidPrinter",
       &set_color_as_default,
       &printer_color_space_for_color,
       &printer_color_space_for_black,
       &set_duplex_as_default,
-      &default_duplex_setting_value);
-  ASSERT_TRUE(res);
+      &default_duplex_setting_value));
   EXPECT_FALSE(set_duplex_as_default);
   EXPECT_EQ(printing::UNKNOWN_DUPLEX_MODE, default_duplex_setting_value);
 }