Browser plugin: Implement loadRedirect event.

content/common/browser_plugin_messages.h

Index: content/common/browser_plugin_messages.h
diff --git a/content/common/browser_plugin_messages.h b/content/common/browser_plugin_messages.h
index a853efb5ba56fbc169a28096a80dac7c66dad57a..8d8a608a2754b54cb7e49e8137812095d655a573 100644
--- a/content/common/browser_plugin_messages.h
+++ b/content/common/browser_plugin_messages.h
@@ -147,6 +147,14 @@ IPC_MESSAGE_CONTROL4(BrowserPluginMsg_LoadAbort,
                      bool /* is_top_level */,
                      std::string /* type */)
 
+// When the guest redirects a navigation, the browser process informs the
+// embedder through the BrowserPluginMsg_LoadRedirect message.
+IPC_MESSAGE_CONTROL4(BrowserPluginMsg_LoadRedirect,
+                     int /* instance_id */,
+                     GURL /* old_url */,
+                     GURL /* new_url */,
+                     bool /* is_top_level */)
+
 // When the guest navigates, the browser process informs the embedder through
 // the BrowserPluginMsg_DidNavigate message.
 IPC_MESSAGE_CONTROL3(BrowserPluginMsg_DidNavigate,