Make Blink test targets generally visible.

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.
 
 import("//tools/grit/grit_rule.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
@@ skipping 50 matching lines @@
     deps -= [
       "//third_party/WebKit/Source/platform:heap_unittests",
       "//third_party/WebKit/Source/platform:platform_unittests",
     ]
   }
   public_configs = [
     "//third_party/WebKit/Source:public_features",
   ]
 }
 
+group("blink_tests") {
+  testonly = true
+
+  deps = [
+    "//third_party/WebKit/Source/platform:heap_unittests",
+    "//third_party/WebKit/Source/platform:platform_unittests",
+    "//third_party/WebKit/Source/wtf:wtf_unittests",
+  ]
+
+  if (is_mac) {
+    # TODO(GYP): Re-enable this as soon as we can link Blink binaries on mac.
+    deps -= [
+      "//third_party/WebKit/Source/platform:heap_unittests",
+      "//third_party/WebKit/Source/platform:platform_unittests",
+    ]
+  }
+}
+
 config("blink_headers_config") {
   include_dirs = [ ".." ]
 }
 
 config("debug_devtools") {
   if (debug_devtools) {
     defines = [ "DEBUG_DEVTOOLS=1" ]
   }
 }
 
@@ skipping 51 matching lines @@
 grit("resources") {
   output_dir = "$root_gen_dir/blink/public/resources"
   use_qualified_include = true
   source = "blink_resources.grd"
   outputs = [
     "grit/blink_resources.h",
     "blink_resources.rc",
     "blink_resources.pak",
   ]
 }