DevTools: Fix build target dependencies following r182595

Source/devtools/BUILD.gn

Index: Source/devtools/BUILD.gn
diff --git a/Source/devtools/BUILD.gn b/Source/devtools/BUILD.gn
index f50e3d7dc3db229fbfec9de6e7d98edf67685b89..ecfdca700ce5c543cf8daac7638c65010dae0e67 100644
--- a/Source/devtools/BUILD.gn
+++ b/Source/devtools/BUILD.gn
@@ -42,6 +42,7 @@ group("devtools_frontend_resources") {
   deps = [
     ":copy_inspector_images",
     ":devtools_html",
+    ":toolbox_html",
     ":frontend_protocol_sources",
     ":supported_css_properties",
     ":build_applications",
@@ -114,6 +115,7 @@ action("generate_devtools_grd") {
 
   deps = [
     ":devtools_html",
+    ":toolbox_html",
     ":devtools_extension_api",
     ":devtools_frontend_resources",
   ]
@@ -264,6 +266,7 @@ action("build_applications") {
   if (!debug_devtools) {
     deps += [
       ":devtools_html",
+      ":toolbox_html",
       ":supported_css_properties",
       ":frontend_protocol_sources",
       ":concatenated_module_descriptors",