Revert "This is a speculative chain of reverts to improve a Chrome"

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index ae39a6559795a8b6f7f192dd2786b124f8c158d7..616bbdb023977ea0e0d8345f9e5d5cef3deb34a0 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -523,43 +523,6 @@ action("js2c") {
   }
 }
 
-action("js2c_experimental") {
-  visibility = [ ":*" ]  # Only targets in this file can depend on this.
-
-  script = "tools/js2c.py"
-
-  # The script depends on this other script, this rule causes a rebuild if it
-  # changes.
-  inputs = [
-    "tools/jsmin.py",
-  ]
-
-  # NOSORT
-  sources = [
-    "src/js/macros.py",
-    "src/messages.h",
-    "src/js/harmony-atomics.js",
-  ]
-
-  outputs = [
-    "$target_gen_dir/experimental-libraries.cc",
-  ]
-
-  args = [
-           rebase_path("$target_gen_dir/experimental-libraries.cc",
-                       root_build_dir),
-           "EXPERIMENTAL",
-         ] + rebase_path(sources, root_build_dir)
-
-  if (v8_use_external_startup_data) {
-    outputs += [ "$target_gen_dir/libraries_experimental.bin" ]
-    args += [
-      "--startup_blob",
-      rebase_path("$target_gen_dir/libraries_experimental.bin", root_build_dir),
-    ]
-  }
-}
-
 action("js2c_extras") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
@@ -670,7 +633,6 @@ if (v8_use_external_startup_data) {
 
     deps = [
       ":js2c",
-      ":js2c_experimental",
       ":js2c_experimental_extras",
       ":js2c_extras",
     ]
@@ -678,7 +640,6 @@ if (v8_use_external_startup_data) {
     # NOSORT
     sources = [
       "$target_gen_dir/libraries.bin",
-      "$target_gen_dir/libraries_experimental.bin",
       "$target_gen_dir/libraries_extras.bin",
       "$target_gen_dir/libraries_experimental_extras.bin",
     ]
@@ -841,7 +802,6 @@ v8_source_set("v8_nosnapshot") {
 
   deps = [
     ":js2c",
-    ":js2c_experimental",
     ":js2c_experimental_extras",
     ":js2c_extras",
     ":v8_base",
@@ -849,7 +809,6 @@ v8_source_set("v8_nosnapshot") {
 
   sources = [
     "$target_gen_dir/experimental-extras-libraries.cc",
-    "$target_gen_dir/experimental-libraries.cc",
     "$target_gen_dir/extras-libraries.cc",
     "$target_gen_dir/libraries.cc",
     "src/snapshot/snapshot-empty.cc",
@@ -868,7 +827,6 @@ v8_source_set("v8_snapshot") {
 
   deps = [
     ":js2c",
-    ":js2c_experimental",
     ":js2c_experimental_extras",
     ":js2c_extras",
     ":v8_base",
@@ -881,7 +839,6 @@ v8_source_set("v8_snapshot") {
 
   sources = [
     "$target_gen_dir/experimental-extras-libraries.cc",
-    "$target_gen_dir/experimental-libraries.cc",
     "$target_gen_dir/extras-libraries.cc",
     "$target_gen_dir/libraries.cc",
     "$target_gen_dir/snapshot.cc",
@@ -896,7 +853,6 @@ if (v8_use_external_startup_data) {
 
     deps = [
       ":js2c",
-      ":js2c_experimental",
       ":js2c_experimental_extras",
       ":js2c_extras",
       ":v8_base",