Fix cc_blink_unittests link errors in static GN builds after r377586.

cc/blink/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("//testing/test.gni")
 
 # GYP version: //cc/blink/cc_blink.gyp:cc_blink
 component("blink") {
   output_name = "cc_blink"
 
@@ skipping 28 matching lines @@
 
   public_deps = [
     "//skia",
   ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//gpu",
-    "//third_party/WebKit/public:blink",
+    "//third_party/WebKit/public:blink_for_unittests",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
 # GYP version: //cc/blink/cc_blink_tests.gyp:cc_blink_unittests
 # TODO(GYP): make linking work on the mac.
 if (!is_mac) {
   test("cc_blink_unittests") {
     sources = [
@@ skipping 12 matching lines @@
       "//cc:test_support",
       "//skia",
       "//testing/gmock",
       "//testing/gtest",
       "//third_party/WebKit/public:blink",
       "//ui/gfx:test_support",
       "//ui/gfx/geometry",
     ]
   }
 }