optimized switch implementation

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/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
@@ skipping 1394 matching lines @@
     "src/utils.h",
     "src/v8.cc",
     "src/v8.h",
     "src/v8memory.h",
     "src/v8threads.cc",
     "src/v8threads.h",
     "src/version.cc",
     "src/version.h",
     "src/vm-state-inl.h",
     "src/vm-state.h",
+    "src/wasm/switch-logic.h",
+    "src/wasm/switch-logic.cc",
     "src/wasm/asm-wasm-builder.cc",
     "src/wasm/asm-wasm-builder.h",
     "src/wasm/ast-decoder.cc",
     "src/wasm/ast-decoder.h",
     "src/wasm/decoder.h",
     "src/wasm/encoder.cc",
     "src/wasm/encoder.h",
     "src/wasm/module-decoder.cc",
     "src/wasm/module-decoder.h",
     "src/wasm/wasm-external-refs.cc",
@@ skipping 732 matching lines @@
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
   configs += [
     ":internal_config",
     ":libplatform_config",
     ":features",
     ":toolchain",
   ]
 }