[embed handlers] Enable embedding of handlers by default

Bug: v8:8068
Change-Id: Iaa89311441305cfe938a938b456045b40dec3943
Reviewed-on: https://chromium-review.googlesource.com/1199463Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55582}

BUILD.gn

@@ -76,9 +76,6 @@ declare_args() {
   v8_enable_embedded_builtins = v8_use_snapshot && v8_current_cpu != "x86" &&
                                 !is_aix && (!is_win || is_clang)
 
-  # Enable embedded bytecode handlers.
-  v8_enable_embedded_bytecode_handlers = false
-
   # Enable code-generation-time checking of types in the CodeStubAssembler.
   v8_enable_verify_csa = false
 
@@ -197,9 +194,6 @@ assert(
         !v8_untrusted_code_mitigations,
     "Embedded builtins on ia32 and untrusted code mitigations are incompatible")
 
-assert(!v8_enable_embedded_bytecode_handlers || v8_enable_embedded_builtins,
-       "Embedded bytecode handlers only work with embedded builtins")
-
 # Specifies if the target build is a simulator build. Comparing target cpu
 # with v8 target cpu to not affect simulator builds for making cross-compile
 # snapshots.
@@ -377,10 +371,10 @@ config("features") {
     defines += [ "V8_CHECK_MICROTASKS_SCOPES_CONSISTENCY" ]
   }
   if (v8_enable_embedded_builtins) {
-    defines += [ "V8_EMBEDDED_BUILTINS" ]
-  }
-  if (v8_enable_embedded_bytecode_handlers) {
-    defines += [ "V8_EMBEDDED_BYTECODE_HANDLERS" ]
+    defines += [
+      "V8_EMBEDDED_BUILTINS",
+      "V8_EMBEDDED_BYTECODE_HANDLERS",
+    ]
   }
   if (v8_use_multi_snapshots) {
     defines += [ "V8_MULTI_SNAPSHOTS" ]