Revert of Add more components tests to GN build.

components/web_cache/browser/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.
 
-source_set("browser") {
+static_library("browser") {
+  output_name = "web_cache_browser"
   sources = [
     "web_cache_manager.cc",
     "web_cache_manager.h",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     "//base",
     "//base:prefs",
     "//components/web_cache/common",
     "//content/public/browser",
     "//third_party/WebKit/public:blink",
   ]
 }
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "web_cache_manager_unittest.cc",
-  ]
-  deps = [
-    ":browser",
-    "//base",
-    "//content/test:test_support",
-    "//testing/gtest",
-  ]
-}