DevTools: introduce browser domain for basic target discovery.

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 dbc28a60092d013d254a532cd054cae603d18cc5..0e2835072f6f8a08d43d63997bdef5bb9498150f 100644
--- a/content/browser/devtools/browser_devtools_agent_host.cc
+++ b/content/browser/devtools/browser_devtools_agent_host.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "content/browser/devtools/devtools_protocol_handler.h"
+#include "content/browser/devtools/protocol/browser_handler.h"
 #include "content/browser/devtools/protocol/io_handler.h"
 #include "content/browser/devtools/protocol/memory_handler.h"
 #include "content/browser/devtools/protocol/system_info_handler.h"
@@ -24,7 +25,8 @@ scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::CreateForBrowser(
 BrowserDevToolsAgentHost::BrowserDevToolsAgentHost(
     scoped_refptr<base::SingleThreadTaskRunner> tethering_task_runner,
     const CreateServerSocketCallback& socket_callback)
-    : io_handler_(new devtools::io::IOHandler(GetIOContext())),
+    : browser_handler_(new devtools::browser::BrowserHandler()),
+      io_handler_(new devtools::io::IOHandler(GetIOContext())),
       memory_handler_(new devtools::memory::MemoryHandler()),
       system_info_handler_(new devtools::system_info::SystemInfoHandler()),
       tethering_handler_(
@@ -36,6 +38,7 @@ BrowserDevToolsAgentHost::BrowserDevToolsAgentHost(
           GetIOContext())),
       protocol_handler_(new DevToolsProtocolHandler(this)) {
   DevToolsProtocolDispatcher* dispatcher = protocol_handler_->dispatcher();
+  dispatcher->SetBrowserHandler(browser_handler_.get());
   dispatcher->SetIOHandler(io_handler_.get());
   dispatcher->SetMemoryHandler(memory_handler_.get());
   dispatcher->SetSystemInfoHandler(system_info_handler_.get());