Revert of [gn] Add unittests

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 0e78539cfcad0c0934427835510e2ea5a1d0d877..7ed7c016ef19cf8c3b18da4b90f9e8c51dcd2d12 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -68,6 +68,15 @@
 
 v8_random_seed = "314159265"
 v8_toolset_for_shell = "host"
+
+if (v8_use_snapshot && v8_use_external_startup_data) {
+  snapshot_target = ":v8_external_snapshot"
+} else if (v8_use_snapshot) {
+  snapshot_target = ":v8_snapshot"
+} else {
+  assert(!v8_use_external_startup_data)
+  snapshot_target = ":v8_nosnapshot"
+}
 
 ###############################################################################
 # Configurations
@@ -633,17 +642,6 @@
 ###############################################################################
 # Source Sets (aka static libraries)
 #
-
-source_set("v8_maybe_snapshot") {
-  if (v8_use_snapshot && v8_use_external_startup_data) {
-    public_deps = [ ":v8_external_snapshot" ]
-  } else if (v8_use_snapshot) {
-    public_deps = [ ":v8_snapshot" ]
-  } else {
-    assert(!v8_use_external_startup_data)
-    public_deps = [ ":v8_nosnapshot" ]
-  }
-}
 
 v8_source_set("v8_nosnapshot") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
@@ -2006,7 +2004,7 @@
   configs = [ ":internal_config_base" ]
 
   deps = [
-    ":v8_maybe_snapshot",
+    snapshot_target,
   ]
 
   public_deps = [
@@ -2048,33 +2046,6 @@
 # Public targets
 #
 
-want_v8_shell = (
-    (current_toolchain == host_toolchain && v8_toolset_for_shell == "host") ||
-    (current_toolchain == v8_snapshot_toolchain &&
-     v8_toolset_for_shell == "host") ||
-    (current_toolchain != host_toolchain && v8_toolset_for_shell == "target"))
-
-group("gn_all") {
-  testonly = true
-
-  deps = [
-    ":d8",
-  ]
-
-  if (want_v8_shell) {
-    deps += [
-      ":v8_shell",
-    ]
-  }
-
-  if (host_os != "mac" || !is_android) {
-    # These items don't compile for Android on Mac.
-    deps += [
-      "test/unittests:unittests",
-    ]
-  }
-}
-
 if (is_component_build) {
   component("v8") {
     sources = [
@@ -2083,7 +2054,7 @@
 
     public_deps = [
       ":v8_base",
-      ":v8_maybe_snapshot",
+      snapshot_target,
     ]
 
     configs -= [ "//build/config/compiler:chromium_code" ]
@@ -2100,7 +2071,7 @@
   group("v8") {
     public_deps = [
       ":v8_base",
-      ":v8_maybe_snapshot",
+      snapshot_target,
     ]
     public_configs = [ ":external_config" ]
   }
@@ -2147,7 +2118,10 @@
   }
 }
 
-if (want_v8_shell) {
+if ((current_toolchain == host_toolchain && v8_toolset_for_shell == "host") ||
+    (current_toolchain == v8_snapshot_toolchain &&
+     v8_toolset_for_shell == "host") ||
+    (current_toolchain != host_toolchain && v8_toolset_for_shell == "target")) {
   executable("v8_shell") {
     sources = [
       "samples/shell.cc",