[Extensions] Use document url (not top url) for tab-specific permissions

extensions/common/extension_messages.h

Index: extensions/common/extension_messages.h
diff --git a/extensions/common/extension_messages.h b/extensions/common/extension_messages.h
index 56855be4175a8c9619df5b581e29a3018e8ab952..bdae495ec88843d2b2c2fc816c0585a2be4d5ca5 100644
--- a/extensions/common/extension_messages.h
+++ b/extensions/common/extension_messages.h
@@ -424,6 +424,11 @@ IPC_MESSAGE_CONTROL2(ExtensionMsg_SetSystemFont,
 IPC_MESSAGE_CONTROL1(ExtensionMsg_ActivateExtension,
                      std::string /* extension_id */)
 
+// Notifies the renderer that the current tab is an extension page (we limit
+// what other extensions can do on these pages).
+IPC_MESSAGE_ROUTED1(ExtensionMsg_SetTabExtensionOwner,
+                    std::string /* extension_id */);
+
 // Notifies the renderer that extensions were loaded in the browser.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_Loaded,
                      std::vector<ExtensionMsg_Loaded_Params>)