[DevTools] Remove InspectorBackendHostedMode.

third_party/WebKit/Source/devtools/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("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 devtools_embedder_scripts = [
   "front_end/devtools_compatibility.js",
@@ skipping 104 matching lines @@
   "front_end/sdk/CSSParser.js",
   "front_end/sdk/CSSProperty.js",
   "front_end/sdk/CSSRule.js",
   "front_end/sdk/CSSStyleDeclaration.js",
   "front_end/sdk/CSSStyleSheetHeader.js",
   "front_end/sdk/DebuggerModel.js",
   "front_end/sdk/DOMModel.js",
   "front_end/sdk/HAREntry.js",
   "front_end/sdk/HeapProfilerModel.js",
   "front_end/sdk/InspectorBackend.js",
-  "front_end/sdk/InspectorBackendHostedMode.js",
   "front_end/sdk/LayerTreeBase.js",
   "front_end/sdk/NetworkLog.js",
   "front_end/sdk/NetworkManager.js",
   "front_end/sdk/NetworkRequest.js",
   "front_end/sdk/PaintProfiler.js",
   "front_end/sdk/ProfileTreeModel.js",
   "front_end/sdk/RemoteObject.js",
   "front_end/sdk/Resource.js",
   "front_end/sdk/ResourceTreeModel.js",
   "front_end/sdk/RuntimeModel.js",
@@ skipping 1012 matching lines @@
     deps = [
       ":frontend_protocol_sources",
       ":supported_css_properties",
     ]
     sources = generated_scripts
     outputs = [
       "$resources_out_debug_dir/{{source_file_part}}",
     ]
   }
 }