Revert "Port 'external startup data' flag from gyp to gn."

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index f9bd41e04fd0bef2df9595a443acad9b2ebe61a9..6c6210c2c4a8845f90c7f6850c64633fa1d851ca 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -218,19 +218,10 @@ action("js2c") {
     sources += [ "src/i18n.js" ]
   }
 
-  args = [
-    rebase_path("$target_gen_dir/libraries.cc", root_build_dir),
-    "CORE",
-    v8_compress_startup_data
-  ] + rebase_path(sources, root_build_dir)
-
-  if (v8_use_external_startup_data) {
-    outputs += [ "$target_gen_dir/libraries.bin" ]
-    args += [
-      "--startup_blob",
-      rebase_path("$target_gen_dir/libraries.bin", root_build_dir)
-    ]
-  }
+  args =
+    rebase_path(outputs, root_build_dir) +
+    [ "CORE", v8_compress_startup_data ] +
+    rebase_path(sources, root_build_dir)
 }
 
 action("js2c_experimental") {
@@ -259,41 +250,10 @@ action("js2c_experimental") {
     "$target_gen_dir/experimental-libraries.cc"
   ]
 
-  args = [
-    rebase_path("$target_gen_dir/experimental-libraries.cc", root_build_dir),
-    "EXPERIMENTAL",
-    v8_compress_startup_data
-  ] + rebase_path(sources, root_build_dir)
-
-  if (v8_use_external_startup_data) {
-    outputs += [ "$target_gen_dir/libraries_experimental.bin" ]
-    args += [
-      "--startup_blob",
-      rebase_path("$target_gen_dir/libraries_experimental.bin", root_build_dir)
-    ]
-  }
-}
-
-action("natives_blob") {
-  visibility = ":*"  # Only targets in this file can depend on this.
-
-  deps = [
-    ":js2c",
-    ":js2c_experimental"
-  ]
-
-  sources = [
-    "$target_gen_dir/libraries.bin",
-    "$target_gen_dir/libraries_experimental.bin"
-  ]
-
-  outputs = [
-    "$root_gen_dir/natives_blob.bin"
-  ]
-
-  script = "tools/concatenate-files.py"
-
-  args = rebase_path(sources + outputs, root_build_dir)
+  args =
+    rebase_path(outputs, root_build_dir) +
+    [ "EXPERIMENTAL", v8_compress_startup_data ] +
+    rebase_path(sources, root_build_dir)
 }
 
 action("postmortem-metadata") {
@@ -331,21 +291,14 @@ action("run_mksnapshot") {
                                       "root_out_dir") + "/mksnapshot",
                        root_build_dir),
     "--log-snapshot-positions",
-    "--logfile", rebase_path("$target_gen_dir/snapshot.log", root_build_dir),
-    rebase_path("$target_gen_dir/snapshot.cc", root_build_dir)
+    "--logfile", rebase_path("$target_gen_dir/snapshot.log", root_build_dir)
   ]
 
   if (v8_random_seed != "0") {
     args += [ "--random-seed", v8_random_seed ]
   }
 
-  if (v8_use_external_startup_data) {
-    outputs += [ "$root_gen_dir/snapshot_blob.bin" ]
-    args += [
-      "--startup_blob",
-      rebase_path("$root_gen_dir/snapshot_blob.bin", root_build_dir)
-    ]
-  }
+  args += rebase_path(outputs, root_build_dir)
 }
 
 
@@ -400,29 +353,6 @@ source_set("v8_snapshot") {
   configs += [ ":internal_config", ":features", ":toolchain" ]
 }
 
-source_set("v8_external_snapshot") {
-  visibility = ":*"  # Only targets in this file can depend on this.
-
-  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",
-  ]
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-  configs += [ ":internal_config", ":features", ":toolchain" ]
-}
-
 source_set("v8_base") {
   visibility = ":*"  # Only targets in this file can depend on this.
 
@@ -1094,12 +1024,7 @@ component("v8") {
     "src/v8dll-main.cc",
   ]
 
-  if (v8_use_external_startup_data) {
-    deps = [
-      ":v8_base",
-      ":v8_external_snapshot",
-    ]
-  } else if (v8_use_snapshot) {
+  if (v8_use_snapshot) {
     deps = [
       ":v8_base",
       ":v8_snapshot",
@@ -1125,12 +1050,7 @@ component("v8") {
 } else {
 
 group("v8") {
-  if (v8_use_external_startup_data) {
-    deps = [
-      ":v8_base",
-      ":v8_external_snapshot",
-    ]
-  } else if (v8_use_snapshot) {
+  if (v8_use_snapshot) {
     deps = [
       ":v8_base",
       ":v8_snapshot",