Extract debugger target enumeration into a separate class

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 39 matching lines @@
     'public/browser/browser_thread_delegate.h',
     'public/browser/cert_store.h',
     'public/browser/child_process_data.h',
     'public/browser/child_process_security_policy.h',
     'public/browser/color_chooser.h',
     'public/browser/compositor_util.h',
     'public/browser/content_browser_client.cc',
     'public/browser/content_browser_client.h',
     'public/browser/devtools_agent_host.h',
     'public/browser/devtools_client_host.h',
+    'public/browser/devtools_target_list.cc',
+    'public/browser/devtools_target_list.h',
     'public/browser/download_danger_type.h',
     'public/browser/download_id.h',
     'public/browser/devtools_frontend_host_delegate.h',
     'public/browser/devtools_http_handler.h',
     'public/browser/devtools_http_handler_delegate.h',
     'public/browser/devtools_manager.h',
     'public/browser/dom_operation_notification_details.h',
     'public/browser/dom_storage_context.h',
     'public/browser/download_destination_observer.h',
     'public/browser/download_interrupt_reason_values.h',
@@ skipping 1153 matching lines @@
         ['exclude', '^browser/speech/'],
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }