Store plug-in enabled/disabled state in PluginPrefs instead of WebPluginInfo.

content/common/pepper_plugin_registry.h

Index: content/common/pepper_plugin_registry.h
diff --git a/content/common/pepper_plugin_registry.h b/content/common/pepper_plugin_registry.h
index d714e2f8185ea3d6f686fa337c1e1f3ac3029e9e..450b17fa6b409b687a414accc012d4b5db1b5b68 100644
--- a/content/common/pepper_plugin_registry.h
+++ b/content/common/pepper_plugin_registry.h
@@ -32,9 +32,6 @@ struct PepperPluginInfo {
   // True when this plugin should be run out of process. Defaults to false.
   bool is_out_of_process;
 
-  // Whether the plugin is enabled.  Defaults to true.
-  bool enabled;
-
   FilePath path;  // Internal plugins have "internal-[name]" as path.
   std::string name;
   std::string description;