Implement chrome://plugins page that can disable plugins.

chrome/browser/browser_prefs.cc

Index: chrome/browser/browser_prefs.cc
diff --git a/chrome/browser/browser_prefs.cc b/chrome/browser/browser_prefs.cc
index 187201aa18ee93207dd8746f4234d68dbf3ee573..12d626d56aac162639758faa8d1ed97a3a6695b6 100644
--- a/chrome/browser/browser_prefs.cc
+++ b/chrome/browser/browser_prefs.cc
@@ -11,6 +11,7 @@
 #include "chrome/browser/cookie_modal_dialog.h"
 #include "chrome/browser/debugger/devtools_manager.h"
 #include "chrome/browser/dom_ui/new_tab_ui.h"
+#include "chrome/browser/dom_ui/plugins_ui.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/extensions/extension_dom_ui.h"
 #include "chrome/browser/extensions/extension_prefs.h"
@@ -97,6 +98,7 @@ void RegisterUserPrefs(PrefService* user_prefs) {
   ExtensionDOMUI::RegisterUserPrefs(user_prefs);
   ExtensionsUI::RegisterUserPrefs(user_prefs);
   NewTabUI::RegisterUserPrefs(user_prefs);
+  PluginsUI::RegisterUserPrefs(user_prefs);
   HostContentSettingsMap::RegisterUserPrefs(user_prefs);
   HostZoomMap::RegisterUserPrefs(user_prefs);
   DevToolsManager::RegisterUserPrefs(user_prefs);