Revert of Sync more GN unit tests with GYP.

components/search/BUILD.gn

Index: components/search/BUILD.gn
diff --git a/components/search/BUILD.gn b/components/search/BUILD.gn
index 8e18d8c6bd77145c01f39e3cb848b1b49540e36d..21c49c4dcc4f1882a238f1dc7a4f4f59709593b2 100644
--- a/components/search/BUILD.gn
+++ b/components/search/BUILD.gn
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("search") {
+static_library("search") {
   sources = [
     "search.cc",
     "search.h",
@@ -17,15 +17,3 @@
     "//url",
   ]
 }
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "search_android_unittest.cc",
-    "search_unittest.cc",
-  ]
-  deps = [
-    ":search",
-    "//testing/gtest",
-  ]
-}