Remove BrowserPlugin's -internal-attach method

content/renderer/browser_plugin/mock_browser_plugin_manager.cc

Index: content/renderer/browser_plugin/mock_browser_plugin_manager.cc
diff --git a/content/renderer/browser_plugin/mock_browser_plugin_manager.cc b/content/renderer/browser_plugin/mock_browser_plugin_manager.cc
index 36d78b8675bf471e41f382c63b1afaa4026ebbd0..6870d0522f63a978d8adebe2bcc12a6a8dd13093 100644
--- a/content/renderer/browser_plugin/mock_browser_plugin_manager.cc
+++ b/content/renderer/browser_plugin/mock_browser_plugin_manager.cc
@@ -14,7 +14,6 @@ namespace content {
 MockBrowserPluginManager::MockBrowserPluginManager(
     RenderViewImpl* render_view)
     : BrowserPluginManager(render_view),
-      guest_instance_id_counter_(0),
       last_plugin_(NULL) {
 }
 
@@ -29,18 +28,6 @@ BrowserPlugin* MockBrowserPluginManager::CreateBrowserPlugin(
   return last_plugin_;
 }
 
-void MockBrowserPluginManager::AllocateInstanceID(
-    BrowserPlugin* browser_plugin) {
-  AllocateInstanceIDACK(browser_plugin, ++guest_instance_id_counter_);
-}
-
-void MockBrowserPluginManager::AllocateInstanceIDACK(
-    BrowserPlugin* browser_plugin,
-    int guest_instance_id) {
-  scoped_ptr<base::DictionaryValue> extra_params(new base::DictionaryValue());
-  browser_plugin->Attach(guest_instance_id, extra_params.Pass());
-}
-
 bool MockBrowserPluginManager::Send(IPC::Message* msg) {
   // This is a copy-and-paste from MockRenderThread::Send.
   // We need to simulate a synchronous channel, thus we are going to receive