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 563684b4b10e63ed842fbd17dfc4ae0364ce6d7f..50134d1fa592cf4946825e8a1d096962d46b52c6 100644
--- a/content/common/browser_plugin_messages.h
+++ b/content/common/browser_plugin_messages.h
@@ -125,6 +125,14 @@ IPC_SYNC_MESSAGE_ROUTED2_0(BrowserPluginHostMsg_ResizeGuest,
 // -----------------------------------------------------------------------------
 // These messages are from the browser process to the embedder.
 
+// 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,