[DevTools] Dedicated frontend for debugging Node.

content/browser/devtools/browser_devtools_agent_host.cc

Index: content/browser/devtools/browser_devtools_agent_host.cc
diff --git a/content/browser/devtools/browser_devtools_agent_host.cc b/content/browser/devtools/browser_devtools_agent_host.cc
index 86d8eecf6668a0a4686abc7a092fce7729e1602a..0d04330f8604b68031c7b6c36ac89be0d2e05e4e 100644
--- a/content/browser/devtools/browser_devtools_agent_host.cc
+++ b/content/browser/devtools/browser_devtools_agent_host.cc
@@ -12,6 +12,7 @@
 #include "content/browser/devtools/protocol/memory_handler.h"
 #include "content/browser/devtools/protocol/protocol.h"
 #include "content/browser/devtools/protocol/system_info_handler.h"
+#include "content/browser/devtools/protocol/target_handler.h"
 #include "content/browser/devtools/protocol/tethering_handler.h"
 #include "content/browser/devtools/protocol/tracing_handler.h"
 #include "content/browser/frame_host/frame_tree_node.h"
@@ -21,15 +22,23 @@ namespace content {
 scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::CreateForBrowser(
     scoped_refptr<base::SingleThreadTaskRunner> tethering_task_runner,
     const CreateServerSocketCallback& socket_callback) {
-  return new BrowserDevToolsAgentHost(tethering_task_runner, socket_callback);
+  return new BrowserDevToolsAgentHost(
+      tethering_task_runner, socket_callback, false);
+}
+
+scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::CreateForDiscovery() {
+  CreateServerSocketCallback null_callback;
+  return new BrowserDevToolsAgentHost(nullptr, null_callback, true);
 }
 
 BrowserDevToolsAgentHost::BrowserDevToolsAgentHost(
     scoped_refptr<base::SingleThreadTaskRunner> tethering_task_runner,
-    const CreateServerSocketCallback& socket_callback)
+    const CreateServerSocketCallback& socket_callback,
+    bool only_discovery)
     : DevToolsAgentHostImpl(base::GenerateGUID()),
       tethering_task_runner_(tethering_task_runner),
-      socket_callback_(socket_callback) {
+      socket_callback_(socket_callback),
+      only_discovery_(only_discovery) {
   NotifyCreated();
 }
 
@@ -37,6 +46,11 @@ BrowserDevToolsAgentHost::~BrowserDevToolsAgentHost() {
 }
 
 void BrowserDevToolsAgentHost::AttachSession(DevToolsSession* session) {
+  if (only_discovery_) {
+    session->AddHandler(base::WrapUnique(new protocol::TargetHandler()));
+    return;
+  }
+
   session->AddHandler(base::WrapUnique(new protocol::IOHandler(
       GetIOContext())));
   session->AddHandler(base::WrapUnique(new protocol::MemoryHandler()));
@@ -80,7 +94,7 @@ bool BrowserDevToolsAgentHost::DispatchProtocolMessage(
     const std::string& message) {
   int call_id;
   std::string method;
-  session->Dispatch(message, false, &call_id, &method);
+  session->Dispatch(message, &call_id, &method);
   return true;
 }