Fix warning for ValueStoreTest

This CL fixes the warning in app_shell_unittests:
The following parameterized test case is not instantiated: UninstantiatedParamaterizedTestSuite<ValueStoreTest>

value_store_unittest.cc defines a TestWithParam class without
instantiating it. Targets that include this via test_support that don't
instantiate the test for themselves (dozens) will trigger the warning.

Bug: 1045846
Change-Id: If6a87e19af1783a8f58ec3e0ff1f03d933c0251e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2143776
Commit-Queue: Alan Cutter <alancutter@chromium.org>
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759538}

chrome/test/BUILD.gn

@@ -4839,6 +4839,7 @@ test("unit_tests") {
       "//components/services/unzip:in_process",
       "//extensions:extensions_resources",
       "//extensions/browser:test_support",
+      "//extensions/browser:value_store_test_support",
       "//extensions/common",
       "//extensions/renderer:unit_test_support",
       "//extensions/strings",

extensions/browser/BUILD.gn

@@ -549,8 +549,6 @@ jumbo_source_set("test_support") {
     "value_store/test_value_store_factory.h",
     "value_store/testing_value_store.cc",
     "value_store/testing_value_store.h",
-    "value_store/value_store_unittest.cc",
-    "value_store/value_store_unittest.h",
   ]
 
   deps = [
@@ -572,6 +570,22 @@ jumbo_source_set("test_support") {
       [ "//extensions/browser/api/declarative_net_request:test_support" ]
 }
 
+jumbo_source_set("value_store_test_support") {
+  testonly = true
+  sources = [
+    "value_store/value_store_unittest.cc",
+    "value_store/value_store_unittest.h",
+  ]
+
+  deps = [
+    "//base",
+    "//base/test:test_support",
+    "//content/test:test_support",
+    "//extensions/browser",
+    "//testing/gtest",
+  ]
+}
+
 source_set("unit_tests") {
   testonly = true
   sources = [
@@ -673,6 +687,7 @@ source_set("unit_tests") {
   deps = [
     ":browser",
     ":test_support",
+    ":value_store_test_support",
     "//base",
     "//base/test:test_support",
     "//components/cast_certificate",