[NaCl] Build fix for disable_nacl=1

chrome/browser/extensions/plugin_manager.h

Index: chrome/browser/extensions/plugin_manager.h
diff --git a/chrome/browser/extensions/plugin_manager.h b/chrome/browser/extensions/plugin_manager.h
index 56eb9f7eb51cd05ae156d79caac76d294a4cfc43..79854ab437c15e28c34aafa7d900cf517288ab93 100644
--- a/chrome/browser/extensions/plugin_manager.h
+++ b/chrome/browser/extensions/plugin_manager.h
@@ -35,6 +35,8 @@ class PluginManager : public BrowserContextKeyedAPI,
  private:
   friend class BrowserContextKeyedAPIFactory<PluginManager>;
 
+#if !defined(DISABLE_NACL)
+
   // We implement some Pepper plug-ins using NaCl to take advantage of NaCl's
   // strong sandbox. Typically, these NaCl modules are stored in extensions
   // and registered here. Not all NaCl modules need to register for a MIME
@@ -50,6 +52,8 @@ class PluginManager : public BrowserContextKeyedAPI,
 
   extensions::NaClModuleInfo::List::iterator FindNaClModule(const GURL& url);
 
+#endif  // !defined(DISABLE_NACL)
+
   // ExtensionRegistryObserver implementation.
   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
                                  const Extension* extension) OVERRIDE;