Run pre-classification checks in the browser before starting client-side phishing detection.

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index d8f3fb654e3248eb0498472315db7b81610bc6ad..86ba2ecffa049d881eb64af04b52942b3e1fd7f1 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -1062,6 +1062,10 @@ IPC_MESSAGE_ROUTED3(ViewMsg_AsyncOpenFile_ACK,
 IPC_MESSAGE_CONTROL1(ViewMsg_SetPhishingModel,
                      IPC::PlatformFileForTransit /* model_file */)
 
+// Tells the renderer to begin phishing detection for the given toplevel URL
+// which it has started loading.
+IPC_MESSAGE_ROUTED1(ViewMsg_StartPhishingDetection, GURL)
+
 // External popup menus.
 IPC_MESSAGE_ROUTED1(ViewMsg_SelectPopupMenuItem,
                     int /* selected index, -1 means no selection */)