DevTools: New snippet button and icon

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/Source/core/core.gni")
 
 devtools_embedder_scripts = [
   "front_end/devtools.js",
   "front_end/Tests.js",
@@ skipping 628 matching lines @@
   "front_end/source_frame/imageView.css",
   "front_end/source_frame/SourcesTextEditor.js",
   "front_end/source_frame/FontView.js",
   "front_end/source_frame/ImageView.js",
   "front_end/source_frame/ResourceSourceFrame.js",
   "front_end/source_frame/SourceFrame.js",
 ]
 devtools_sources_js_files = [
   "front_end/sources/eventListenerBreakpoints.css",
   "front_end/sources/fileBasedSearchResultsPane.css",
+  "front_end/sources/navigatorTree.css",
   "front_end/sources/navigatorView.css",
   "front_end/sources/revisionHistory.css",
   "front_end/sources/serviceWorkersSidebar.css",
   "front_end/sources/sourcesPanel.css",
   "front_end/sources/sourcesSearch.css",
   "front_end/sources/sourcesView.css",
   "front_end/sources/uiList.css",
   "front_end/sources/AddSourceMapURLDialog.js",
   "front_end/sources/AdvancedSearchView.js",
   "front_end/sources/CallStackSidebarPane.js",
@@ skipping 488 matching lines @@
     deps = [
       ":frontend_protocol_sources",
       ":supported_css_properties",
     ]
     sources = generated_scripts
     outputs = [
       "$resources_out_debug_dir/{{source_file_part}}",
     ]
   }
 }