Fix BUILD.gn after r22923.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 3e0f751e1e13fafab0704842703f6671c6c2c2ec..e8798e4857e9050f20f87df754fc40caab04e4c9 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -166,18 +166,6 @@ config("toolchain") {
 # Actions
 #
 
-action("generate_trig_table") {
-  visibility = ":*"  # Only targets in this file can depend on this.
-
-  script = "tools/generate-trig-table.py"
-
-  outputs = [
-    "$target_gen_dir/trig-table.cc"
-  ]
-
-  args = rebase_path(outputs, root_build_dir)
-}
-
 action("js2c") {
   visibility = ":*"  # Only targets in this file can depend on this.
 
@@ -362,14 +350,12 @@ source_set("v8_nosnapshot") {
   deps = [
     ":js2c",
     ":js2c_experimental",
-    ":generate_trig_table",
     ":v8_base",
   ]
 
   sources = [
     "$target_gen_dir/libraries.cc",
     "$target_gen_dir/experimental-libraries.cc",
-    "$target_gen_dir/trig-table.cc",
     "src/snapshot-empty.cc",
     "src/snapshot-common.cc",
   ]
@@ -385,7 +371,6 @@ source_set("v8_snapshot") {
   deps = [
     ":js2c",
     ":js2c_experimental",
-    ":generate_trig_table",
     ":run_mksnapshot",
     ":v8_base",
   ]
@@ -393,7 +378,6 @@ source_set("v8_snapshot") {
   sources = [
     "$target_gen_dir/libraries.cc",
     "$target_gen_dir/experimental-libraries.cc",
-    "$target_gen_dir/trig-table.cc",
     "$target_gen_dir/snapshot.cc",
     "src/snapshot-common.cc",
   ]
@@ -410,14 +394,12 @@ if (v8_use_external_startup_data) {
     deps = [
       ":js2c",
       ":js2c_experimental",
-      ":generate_trig_table",
       ":run_mksnapshot",
       ":v8_base",
       ":natives_blob",
     ]
 
     sources = [
-      "$target_gen_dir/trig-table.cc",
       "src/natives-external.cc",
       "src/snapshot-external.cc",
     ]