[DevTools] Introduce DevToolsSession.

content/browser/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//printing/features/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
@@ skipping 405 matching lines @@
     "devtools/devtools_frontend_host_impl.cc",
     "devtools/devtools_frontend_host_impl.h",
     "devtools/devtools_http_handler.cc",
     "devtools/devtools_http_handler.h",
     "devtools/devtools_io_context.cc",
     "devtools/devtools_io_context.h",
     "devtools/devtools_manager.cc",
     "devtools/devtools_manager.h",
     "devtools/devtools_protocol_handler.cc",
     "devtools/devtools_protocol_handler.h",
+    "devtools/devtools_session.cc",
+    "devtools/devtools_session.h",
     "devtools/forwarding_agent_host.cc",
     "devtools/forwarding_agent_host.h",
     "devtools/page_navigation_throttle.cc",
     "devtools/page_navigation_throttle.h",
     "devtools/protocol/color_picker.cc",
     "devtools/protocol/color_picker.h",
     "devtools/protocol/devtools_protocol_client.cc",
     "devtools/protocol/devtools_protocol_client.h",
     "devtools/protocol/devtools_protocol_delegate.h",
     "devtools/protocol/dom_handler.cc",
@@ skipping 1527 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }