Introduce a secondary map for enabling plznavigate

android_webview/browser/aw_contents_io_thread_client.h

Index: android_webview/browser/aw_contents_io_thread_client.h
diff --git a/android_webview/browser/aw_contents_io_thread_client.h b/android_webview/browser/aw_contents_io_thread_client.h
index e9a0bf3411514f0f28d08fdd5223375034ab3b9f..2594e0798ef4bc7ba056fbc5af955a0cb74242d5 100644
--- a/android_webview/browser/aw_contents_io_thread_client.h
+++ b/android_webview/browser/aw_contents_io_thread_client.h
@@ -63,6 +63,9 @@ class AwContentsIoThreadClient {
   static std::unique_ptr<AwContentsIoThreadClient> FromID(int render_process_id,
                                                           int render_frame_id);
 
+  static std::unique_ptr<AwContentsIoThreadClient> FromID(

[jam, 2017/03/09 22:13:05]

nit: document, i.e. so someone reading this knows why there are two methods

[sgurun-gerrit only, 2017/03/10 18:40:58]

Done.

+      int frame_tree_node_id);
+
   // Returns the global thread client for service worker related callbacks.
   // An empty scoped_ptr is a valid return value.
   static std::unique_ptr<AwContentsIoThreadClient>