Added a test that currently is able to print to pdf.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index f09879c47069f57f76a83acf61f2fe29b41ca36e..5481ca067bdcd4be713e504668e6871e4506a4a2 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1312,6 +1312,7 @@
         'browser/printing/cloud_print/test/cloud_print_policy_browsertest.cc',
         'browser/printing/cloud_print/test/cloud_print_proxy_process_browsertest.cc',
         'browser/printing/print_preview_dialog_controller_browsertest.cc',
+        'browser/printing/print_preview_pdf_generated_browsertest.cc',
         'browser/process_singleton_browsertest.cc',
         'browser/profiles/host_zoom_map_browsertest.cc',
         'browser/profiles/profile_browsertest.cc',
@@ -1994,6 +1995,7 @@
             ['exclude', '^browser/extensions/api/cloud_print_private/cloud_print_private_apitest.cc'],
             ['exclude', '^browser/printing/cloud_print/test/.*'],
             ['exclude', '^browser/printing/print_preview_dialog_controller_browsertest.cc'],
+            ['exclude', '^browser/printing/print_preview_pdf_generated_browsertest.cc'],
             ['exclude', '^browser/ui/webui/print_preview/print_preview_ui_browsertest.cc'],
             ['exclude', '^renderer/printing/print_web_view_helper_browsertest.cc'],
             ['exclude', '^test/data/webui/print_preview.cc'],