Add support for a "split" incognito behavior for extensions.

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 1c659345ddcffdb3e606ffdd8a04ced40d10a2c4..38b6a5ba0c7293d3962ec0985744bfc02ed23cac 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -746,10 +746,11 @@ IPC_BEGIN_MESSAGES(View)
       std::vector<URLPattern> /* URLPatterns the extension can access */)
 
   // Tell the renderer process that the given extension is enabled or disabled
-  // for incognito mode.
-  IPC_MESSAGE_CONTROL2(ViewMsg_Extension_ExtensionSetIncognitoEnabled,
+  // for incognito mode, and what kind of incognito behavior it has.
+  IPC_MESSAGE_CONTROL3(ViewMsg_Extension_ExtensionSetIncognitoEnabled,
                        std::string /* extension_id */,
-                       bool /* enabled */)
+                       bool /* enabled */,
+                       bool /* incognito_split_mode */)
 
   // Tell the renderer process all known page action ids for a particular
   // extension.