Browser Plugin: Implement CanGoBack/CanGoForward

content/renderer/browser_plugin/browser_plugin_manager_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
 
 #include "content/common/browser_plugin_messages.h"
 #include "content/renderer/browser_plugin/browser_plugin.h"
 #include "content/renderer/render_thread_impl.h"
 
@@ skipping 26 matching lines @@
   IPC_BEGIN_MESSAGE_MAP(BrowserPluginManagerImpl, message)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_UpdateRect, OnUpdateRect)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_GuestCrashed, OnGuestCrashed)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_DidNavigate, OnDidNavigate)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_AdvanceFocus, OnAdvanceFocus)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_ShouldAcceptTouchEvents,
                         OnShouldAcceptTouchEvents)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_LoadStart, OnLoadStart)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_LoadAbort, OnLoadAbort)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_LoadRedirect, OnLoadRedirect)
+    IPC_MESSAGE_HANDLER(BrowserPluginMsg_NavigationStateUpdate,
+                        OnNavigationStateUpdate)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void BrowserPluginManagerImpl::OnUpdateRect(
     int instance_id,
     int message_id,
     const BrowserPluginMsg_UpdateRect_Params& params) {
   BrowserPlugin* plugin = GetBrowserPlugin(instance_id);
@@ skipping 47 matching lines @@
 
 void BrowserPluginManagerImpl::OnLoadRedirect(int instance_id,
                                               const GURL& old_url,
                                               const GURL& new_url,
                                               bool is_top_level) {
   BrowserPlugin* plugin = GetBrowserPlugin(instance_id);
   if (plugin)
     plugin->LoadRedirect(old_url, new_url, is_top_level);
 }
 
+void BrowserPluginManagerImpl::OnNavigationStateUpdate(int instance_id,
+                                                       int current_entry_index,
+                                                       int entry_count) {
+  BrowserPlugin* plugin = GetBrowserPlugin(instance_id);
+  if (plugin)
+    plugin->NavigationStateUpdate(current_entry_index, entry_count);
+}
+
 }  // namespace content