AndroidOverlay implementation using Dialog.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index fbf545b8694f14fe1d2685c176186ad42e87ae5d..d6b4ea0be9bee4d419515ab1e22c13d290a0b72d 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1621,6 +1621,8 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_GetNearestFindResult,
                         OnGetNearestFindResult)
     IPC_MESSAGE_HANDLER(FrameMsg_FindMatchRects, OnFindMatchRects)
+    IPC_MESSAGE_HANDLER(FrameMsg_SetOverlayRoutingToken,
+                        OnSetOverlayRoutingToken)
 #endif
 
 #if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)
@@ -5873,6 +5875,28 @@ void RenderFrameImpl::OnFindMatchRects(int current_version) {
   Send(new FrameHostMsg_FindMatchRects_Reply(routing_id_, rects_version,
                                              match_rects, active_rect));
 }
+
+void RenderFrameImpl::OnSetOverlayRoutingToken(
+    const base::UnguessableToken& token) {
+  overlay_routing_token_ = token;
+  for (const auto& cb : pending_routing_token_callbacks_)
+    cb.Run(overlay_routing_token_.value());
+  pending_routing_token_callbacks_.clear();
+}
+
+void RenderFrameImpl::GetOverlayRoutingToken(

[aelias_OOO_until_Jul13, 2017/04/26 23:41:22]

I typically expect methods named "Get" to be more passive than this, please
rename to RequestOverlayRoutingToken.

[liberato (no reviews please), 2017/05/02 17:05:12]

Done.

+    const media::RoutingTokenCallback& callback) {
+  if (overlay_routing_token_.has_value()) {
+    callback.Run(overlay_routing_token_.value());
+    return;
+  }
+
+  // Send a request to the host for the token.  We'll notify |callback| when it
+  // arrives later.
+  Send(new FrameHostMsg_RequestOverlayRoutingToken(routing_id_));
+
+  pending_routing_token_callbacks_.push_back(callback);
+}
 #endif
 
 #if BUILDFLAG(USE_EXTERNAL_POPUP_MENU)