Print Preview tests: Remove unnecessary C++ class definition

chrome/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 1758 matching lines @@
       "base/web_ui_browser_test_browsertest.cc",
       "data/webui/async_gen.cc",
       "data/webui/async_gen.h",
       "data/webui/certificate_viewer_ui_test-inl.h",
       "data/webui/chrome_send_browsertest.cc",
       "data/webui/chrome_send_browsertest.h",
       "data/webui/history_ui_browsertest.cc",
       "data/webui/history_ui_browsertest.h",
       "data/webui/ntp4_browsertest.cc",
       "data/webui/ntp4_browsertest.h",
-      "data/webui/print_preview.cc",
-      "data/webui/print_preview.h",
       "data/webui/webui_resource_browsertest.cc",
       "gpu/webgl_infobar_browsertest.cc",
       "ppapi/ppapi_browsertest.cc",
       "ppapi/ppapi_filechooser_browsertest.cc",
     ]
 
     deps += [
       ":sync_integration_test_support",
       ":test_support_ui",
       "//base:i18n",
@@ skipping 765 matching lines @@
         "//third_party/widevine/cdm:widevinecdmadapter",
       ]
     }
     if (!enable_print_preview) {
       sources -= [
         "../browser/extensions/api/cloud_print_private/cloud_print_private_apitest.cc",
         "../browser/printing/print_preview_dialog_controller_browsertest.cc",
         "../browser/printing/print_preview_pdf_generated_browsertest.cc",
         "../browser/service_process/service_process_control_browsertest.cc",
         "../browser/ui/webui/print_preview/print_preview_ui_browsertest.cc",
-        "data/webui/print_preview.cc",
-        "data/webui/print_preview.h",
       ]
     }
     if (!enable_print_preview || is_mac || is_chromeos) {
       sources -= [
         # This test depends on GetCommandLineForRelaunch, which is not
         # available on Mac. It is also not intended to run on ChromeOS.
         "../browser/printing/cloud_print/test/cloud_print_policy_browsertest.cc",
       ]
     }
     if (!enable_print_preview || is_chromeos) {
@@ skipping 2552 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }