Remove PluginLoadObserver and related logic, it was only used for NPAPI.

content/plugin/webplugin_delegate_stub.cc

Index: content/plugin/webplugin_delegate_stub.cc
diff --git a/content/plugin/webplugin_delegate_stub.cc b/content/plugin/webplugin_delegate_stub.cc
index 8d4587d8cbeb18db0707874d7dbe5b6b95f0d517..549e4b1b4b321dbebb72ade11c97afa407b9e9b1 100644
--- a/content/plugin/webplugin_delegate_stub.cc
+++ b/content/plugin/webplugin_delegate_stub.cc
@@ -99,8 +99,6 @@ bool WebPluginDelegateStub::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(PluginMsg_DidReceiveData, OnDidReceiveData)
     IPC_MESSAGE_HANDLER(PluginMsg_DidFinishLoading, OnDidFinishLoading)
     IPC_MESSAGE_HANDLER(PluginMsg_DidFail, OnDidFail)
-    IPC_MESSAGE_HANDLER(PluginMsg_DidFinishLoadWithReason,
-                        OnDidFinishLoadWithReason)
     IPC_MESSAGE_HANDLER(PluginMsg_SetFocus, OnSetFocus)
     IPC_MESSAGE_HANDLER(PluginMsg_HandleInputEvent, OnHandleInputEvent)
     IPC_MESSAGE_HANDLER(PluginMsg_Paint, OnPaint)
@@ -247,11 +245,6 @@ void WebPluginDelegateStub::OnDidFail(int id) {
   client->DidFail(id);
 }
 
-void WebPluginDelegateStub::OnDidFinishLoadWithReason(
-    const GURL& url, int reason, int notify_id) {
-  delegate_->DidFinishLoadWithReason(url, reason, notify_id);
-}
-
 void WebPluginDelegateStub::OnSetFocus(bool focused) {
   delegate_->SetFocus(focused);
 #if defined(OS_WIN) && !defined(USE_AURA)
@@ -315,9 +308,8 @@ void WebPluginDelegateStub::OnGetFormValue(base::string16* value,
 
 void WebPluginDelegateStub::OnSendJavaScriptStream(const GURL& url,
                                                    const std::string& result,
-                                                   bool success,
-                                                   int notify_id) {
-  delegate_->SendJavaScriptStream(url, result, success, notify_id);
+                                                   bool success) {
+  delegate_->SendJavaScriptStream(url, result, success);
 }
 
 void WebPluginDelegateStub::OnSetContentAreaFocus(bool has_focus) {
@@ -400,9 +392,9 @@ void WebPluginDelegateStub::OnDidManualLoadFail() {
 }
 
 void WebPluginDelegateStub::OnHandleURLRequestReply(
-    unsigned long resource_id, const GURL& url, int notify_id) {
+    unsigned long resource_id, const GURL& url) {
   WebPluginResourceClient* resource_client =
-      delegate_->CreateResourceClient(resource_id, url, notify_id);
+      delegate_->CreateResourceClient(resource_id, url);
   webplugin_->OnResourceCreated(resource_id, resource_client);
 }
 
@@ -420,7 +412,6 @@ void WebPluginDelegateStub::OnFetchURL(
     data = &params.post_data[0];
 
   delegate_->FetchURL(params.resource_id,
-                      params.notify_id,
                       params.url,
                       params.first_party_for_cookies,
                       params.method,