Implement automatic load of composed/embedded automation trees

chrome/common/extensions/api/automation_internal.idl

Index: chrome/common/extensions/api/automation_internal.idl
diff --git a/chrome/common/extensions/api/automation_internal.idl b/chrome/common/extensions/api/automation_internal.idl
index e95701decfb01da1e090c82ec5a5ece54484769d..f9d1ec9b65eb96b997c9728cc65abea950d0dce6 100644
--- a/chrome/common/extensions/api/automation_internal.idl
+++ b/chrome/common/extensions/api/automation_internal.idl
@@ -98,6 +98,10 @@ namespace automationInternal {
     // future updates.
     static void enableTab(optional long tabId, EnableTabCallback callback);
 
+    // Enable automation of the renderer with the given process id and routing

[dmazzoni, 2014/10/29 06:53:30]

Change renderer to Frame or WebContents or whatever specifically this applies
to.

Looking towards the future, I think this will just give you one frame, right?
Yes, accessibility will be enabled for the whole WebContents, but you'll only be
subscribed to one frame and not subframes by default.

+    //id.
+    static void enableRenderer(long processID, long routingID);
+
     // Enables desktop automation.
     static void enableDesktop(EnableDesktopCallback callback);