Remove unneeded friends for PrintPreviewHandler.

Change-Id: I665b95a6d848f6b5387c0298c11f9c0c5c7c220a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1775393
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691476}

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

@@ -144,11 +144,6 @@ class PrintPreviewHandler : public content::WebUIMessageHandler,
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewPdfGeneratedBrowserTest,
                            MANUAL_DummyTest);
   friend class PrintPreviewHandlerTest;
-  FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, InitialSettingsSimple);
-  FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
-                           InitialSettingsEnableHeaderFooter);
-  FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
-                           InitialSettingsDisableHeaderFooter);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, GetPrinters);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, GetPrinterCapabilities);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, Print);