Remove natives_blob.bin's arch dependence in Android.

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/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 497 matching lines @@
   args = rebase_path(outputs, root_build_dir) + [ "D8" ] +
          rebase_path(inputs, root_build_dir)
 }
 
 if (is_android) {
   android_assets("v8_external_startup_data_assets") {
     if (v8_use_external_startup_data) {
       deps = [
         "//v8",
       ]
-      renaming_sources = v8_external_startup_data_renaming_sources
-      renaming_destinations = v8_external_startup_data_renaming_destinations
+      sources = [
+        "$root_out_dir/natives_blob.bin",
+      ]
+      renaming_sources = [ "$root_out_dir/snapshot_blob.bin" ]
+      if (current_cpu == "arm" || current_cpu == "x86" ||
+          current_cpu == "mipsel") {
+        renaming_destinations = [ "snapshot_blob_32.bin" ]

[Yang, 2016/06/22 12:59:50]

Does this actually work? in src/startup-data-util.cc we hard-code the default
snapshot file names.

[michaelbai, 2016/06/22 16:00:37]

This target "v8_external_startup_data_assets" isn't used by v8 itself.

The way to load snapshot in startup-data-util.cc doesn't work in Android,
Android loads the snapshot from APK in gin/v8_initializer.cc.

+      } else {
+        renaming_destinations = [ "snapshot_blob_64.bin" ]
+      }
       disable_compression = true
     }
   }
 }
 
 if (v8_use_external_startup_data) {
   action("natives_blob") {
     visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
     deps = [
@@ skipping 1722 matching lines @@
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [ ":internal_config" ]
 }
 
 v8_fuzzer("wasm_asmjs_fuzzer") {
 }