DevTools: enable target domain handler on the browser target, make browser target non-discoverable.

chrome/browser/devtools/device/port_forwarding_controller.cc

Index: chrome/browser/devtools/device/port_forwarding_controller.cc
diff --git a/chrome/browser/devtools/device/port_forwarding_controller.cc b/chrome/browser/devtools/device/port_forwarding_controller.cc
index 35587ac62e3abfc99998252b2e6bf0ad235ca1c6..03a7f5841281b0e93dfdf8652bfa41243f153a55 100644
--- a/chrome/browser/devtools/device/port_forwarding_controller.cc
+++ b/chrome/browser/devtools/device/port_forwarding_controller.cc
@@ -16,6 +16,7 @@
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/threading/non_thread_safe.h"
+#include "chrome/browser/devtools/chrome_devtools_manager_delegate.h"
 #include "chrome/browser/devtools/devtools_protocol.h"
 #include "chrome/browser/devtools/devtools_protocol_constants.h"
 #include "chrome/browser/profiles/profile.h"
@@ -260,9 +261,11 @@ PortForwardingController::Connection::Connection(
       forwarding_map_(forwarding_map) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   (*registry_)[device_->serial()] = this;
-  web_socket_.reset(
-      device_->CreateWebSocket(browser->socket(),
-                               kDevToolsRemoteBrowserTarget, this));
+  std::string path = kDevToolsRemoteBrowserTarget;
+  std::string guid = ChromeDevToolsManagerDelegate::GetBrowserGUID();
+  if (!guid.empty())
+    path = path + "/" + guid;
+  web_socket_.reset(device_->CreateWebSocket(browser->socket(), path, this));
 }
 
 PortForwardingController::Connection::~Connection() {