Block non-sandboxed plugins.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 943e56b50f72cb4bdb82dc5a719697d5295f2552..c12e9a1dc0fb525d22076d35b50e1d9ffeb8b5a0 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -64,6 +64,9 @@ const char kAuthServerWhitelist[]           = "auth-server-whitelist";
 // automation-related messages on IPC channel with the given ID.
 const char kAutomationClientChannelID[]     = "automation-channel";
 
+// Block non-sandboxed plugins.
+const char kBlockNonSandboxedPlugins[]      = "block-nonsandboxed-plugins";
+
 // Causes the browser process to throw an assertion on startup.
 const char kBrowserAssertTest[]             = "assert-test";