Make deps of GN groups public.

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")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("devtools.gypi") ],
     "scope",
@@ skipping 64 matching lines @@
 generated_scripts = [
   resources_out_dir + "InspectorBackendCommands.js",
   resources_out_dir + "SupportedCSSProperties.js",
 ]
 
 #-------------------------------------------------------------------------------
 
 visibility = [ "//third_party/WebKit/*" ]
 
 group("devtools_frontend_resources") {
-  deps = [
+  public_deps = [
     ":copy_compatibility_scripts",
     ":copy_inspector_images",
     ":copy_emulated_devices_images",
     ":devtools_extension_api",
     ":frontend_protocol_sources",
     ":supported_css_properties",
     ":build_applications",
   ]
 
   if (!debug_devtools) {
     # This overwrites application-specific core CSS (devtools.css),
     # and thus should be guarded out in Debug builds.
-    deps += [
+    public_deps += [
       ":concatenated_inspector_css",
       ":concatenated_toolbox_css",
     ]
   }
 }
 
 copy("copy_compatibility_scripts") {
   sources = gypi_values.devtools_compatibility_scripts
   outputs = [ resources_out_dir + "{{source_file_part}}" ]
 }
@@ skipping 184 matching lines @@
     "inspector", "toolbox",
     "--input_path", rebase_path("front_end", root_build_dir),
     "--output_path", rebase_path(resources_out_dir, root_build_dir),
     "--debug", debug_mode
   ]
 }
 
 if (debug_devtools) {
   # Debug: copy non-module directories and core into resources_out_dir as-is.
   group("copy_debug_non_modules") {
-    deps = [
+    public_deps = [
       ":copy_runtime_core",
       ":copy_acorn_js_files",
       ":copy_codemirror_files",
     ]
   }
 
   copy("copy_runtime_core") {
     sources = gypi_values.devtools_core_base_files +
       gypi_values.devtools_core_css_files
     outputs = [ resources_out_dir + "/{{source_file_part}}" ]
@@ skipping 31 matching lines @@
   }
 
   concatenate_css("concatenated_inspector_css") {
     app_name = "inspector"
   }
 
   concatenate_css("concatenated_toolbox_css") {
     app_name = "toolbox"
   }
 }