Move debug_devtools to a buildflag_header.

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 315aa5858e2b82e337cc88408d7c2392d54d3565..e21121220284a1fb3c046fe0d0c0f799161ac76a 100644
--- a/chrome/browser/devtools/device/port_forwarding_controller.cc
+++ b/chrome/browser/devtools/device/port_forwarding_controller.cc
@@ -31,6 +31,7 @@
 #include "net/log/net_log_source.h"
 #include "net/log/net_log_with_source.h"
 #include "net/socket/tcp_client_socket.h"
+#include "third_party/WebKit/public/public_features.h"
 
 using content::BrowserThread;
 
@@ -316,9 +317,9 @@ void PortForwardingController::Connection::SendCommand(
     pending_responses_[id] =
         base::Bind(&Connection::ProcessBindResponse,
                    base::Unretained(this), port);
-#if defined(DEBUG_DEVTOOLS)
+#if BUILDFLAG(DEBUG_DEVTOOLS)
     port_status_[port] = kStatusConnecting;
-#endif  // defined(DEBUG_DEVTOOLS)
+#endif  // BUILDFLAG(DEBUG_DEVTOOLS)
   } else {
     PortStatusMap::iterator it = port_status_.find(port);
     if (it != port_status_.end() && it->second == kStatusError) {
@@ -330,9 +331,9 @@ void PortForwardingController::Connection::SendCommand(
     pending_responses_[id] =
         base::Bind(&Connection::ProcessUnbindResponse,
                    base::Unretained(this), port);
-#if defined(DEBUG_DEVTOOLS)
+#if BUILDFLAG(DEBUG_DEVTOOLS)
     port_status_[port] = kStatusDisconnecting;
-#endif  // defined(DEBUG_DEVTOOLS)
+#endif  // BUILDFLAG(DEBUG_DEVTOOLS)
   }
 
   web_socket_->SendFrame(