Remove NPAPI from browser and utility

content/shell/app/blink_test_platform_support_mac.mm

Index: content/shell/app/blink_test_platform_support_mac.mm
diff --git a/content/shell/app/blink_test_platform_support_mac.mm b/content/shell/app/blink_test_platform_support_mac.mm
index 1f45aa822d0fa53879eb319b4faadc11347f5d73..7a165636f53a27e55ac98c005e2c13c1c0855699 100644
--- a/content/shell/app/blink_test_platform_support_mac.mm
+++ b/content/shell/app/blink_test_platform_support_mac.mm
@@ -83,16 +83,6 @@ bool BlinkTestPlatformInitialize() {
     DLOG(FATAL) << "Fail to activate fonts.";
     CFRelease(errors);
   }
-
-  // Add <app bundle's parent dir>/plugins to the plugin path so we can load
-  // test npapi plugins (soon to be removed).
-  const char kExtraPluginDir[] = "extra-plugin-dir";
-  base::FilePath plugins_dir;
-  PathService::Get(base::DIR_EXE, &plugins_dir);
-  plugins_dir = plugins_dir.AppendASCII("../../../plugins");
-  base::CommandLine& command_line = *base::CommandLine::ForCurrentProcess();
-  command_line.AppendSwitchPath(kExtraPluginDir, plugins_dir);
-
   return true;
 }