GN: Re-enable platform unit test targets

public/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.
 
 if (!is_android) {
 
 # GYP version: WebKit/public/blink.gyp:blink
 group("blink") {
   deps = [
     ":blink_headers",
@@ skipping 20 matching lines @@
 #  deps = [
 #    "//third_party/WebKit/Source/web:test_support",
 #  ]
 #}
 
 # GYP version: WebKit/public/all.gyp:all_blink
 group("all_blink") {
   deps = [
     "//third_party/WebKit/Source/core",
     "//third_party/WebKit/Source/modules",
+    "//third_party/WebKit/Source/platform:heap_unittests",
+    "//third_party/WebKit/Source/platform:platform_unittests",
     "//third_party/WebKit/Source/web",
     "//third_party/WebKit/Source/wtf:wtf_unittests",
   ]
 }
 
 }  # !is_android
 
 config("blink_headers_config") {
   include_dirs = [ ".." ]
 }
@@ skipping 10 matching lines @@
     "//third_party/WebKit/Source/devtools:devtools_frontend_resources",
   ]
 }
 
 # GYP version: WebKit/public/blink_devtools.gyp:blink_generate_devtools_grd
 group("blink_generate_devtools_grd") {
   deps = [
     "//third_party/WebKit/Source/devtools:generate_devtools_grd",
   ]
 }