Update printer unit tests to call new SetUri method

Two unit tests were still calling the (removed) set_uri() method
instead of the (new) SetUri() method. Updated the tests.

Bug: 1113983
Test: autoninja -C out_${BOARD}/Release unit_tests builds without errors
Change-Id: Ibd45ff3729d3b5a076913ccd7408402154785d7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2342424Reviewed-by: Nikita Podguzov <nikitapodguzov@chromium.org>
Reviewed-by: Piotr Pawliczek <pawliczek@chromium.org>
Commit-Queue: Josh Simmons <simmonsjosh@google.com>
Cr-Commit-Position: refs/heads/master@{#798864}

chrome/browser/chromeos/extensions/printing/printing_api_handler_unittest.cc

@@ -188,7 +188,7 @@ chromeos::Printer ConstructPrinter(const std::string& id,
   chromeos::Printer printer(id);
   printer.set_display_name(name);
   printer.set_description(description);
-  printer.set_uri(uri);
+  EXPECT_TRUE(printer.SetUri(uri));
   printer.set_source(source);
   return printer;
 }

chrome/browser/chromeos/extensions/printing/printing_api_utils_unittest.cc

@@ -134,7 +134,7 @@ TEST(PrintingApiUtilsTest, PrinterToIdl) {
   chromeos::Printer printer(kId);
   printer.set_display_name(kName);
   printer.set_description(kDescription);
-  printer.set_uri(kUri);
+  EXPECT_TRUE(printer.SetUri(kUri));
   printer.set_source(chromeos::Printer::SRC_POLICY);
 
   base::Optional<DefaultPrinterRules> default_printer_rules =