DevTools: untangle device discovery request from the devtools android bridge.

content/browser/devtools/render_frame_devtools_agent_host.cc

Index: content/browser/devtools/render_frame_devtools_agent_host.cc
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.cc b/content/browser/devtools/render_frame_devtools_agent_host.cc
index c2d13d65aa25319b23562ad25c325714aa6ad509..c5c153bac30ac500d9b22dd1762465a0e75d50ad 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.cc
+++ b/content/browser/devtools/render_frame_devtools_agent_host.cc
@@ -1015,7 +1015,7 @@ void RenderFrameDevToolsAgentHost::OnRequestNewWindow(
   if (IsAttached() && sender->GetRoutingID() != new_routing_id && frame_host) {
     scoped_refptr<DevToolsAgentHost> agent =
         DevToolsAgentHost::GetOrCreateFor(frame_host);
-    success = agent->Inspect();
+    success = static_cast<DevToolsAgentHostImpl*>(agent.get())->Inspect();
   }
 
   sender->Send(new DevToolsAgentMsg_RequestNewWindow_ACK(