Remove kEnablePrintPreview now that the pdf plugin is part of Chromium.

chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
===================================================================
--- chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc	(revision 271915)
+++ chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc	(working copy)
@@ -46,12 +46,6 @@
  public:
   PrintPreviewTest() {}
 
-#if !defined(GOOGLE_CHROME_BUILD)
-  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
-    command_line->AppendSwitch(switches::kEnablePrintPreview);
-  }
-#endif
-
   void Print() {
     content::TestNavigationObserver nav_observer(NULL);
     nav_observer.StartWatchingNewWebContents();