Remove NPAPI from browser and utility

chrome/browser/download/download_browsertest.cc

Index: chrome/browser/download/download_browsertest.cc
diff --git a/chrome/browser/download/download_browsertest.cc b/chrome/browser/download/download_browsertest.cc
index f65d3f66f13e72f762c606915c41dca225c1e06b..88ad87c3527a878734a4946fde959b282db1271f 100644
--- a/chrome/browser/download/download_browsertest.cc
+++ b/chrome/browser/download/download_browsertest.cc
@@ -437,10 +437,6 @@ class DownloadTest : public InProcessBrowserTest {
     file_activity_observer_.reset();
   }
 
-  void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kDisablePluginsDiscovery);
-  }
-
   // Returning false indicates a failure of the setup, and should be asserted
   // in the caller.
   virtual bool InitialSetup() {