[Captive Portal] Componentize CaptivePortalService unittest

Follows the componentization of the production code.

TBR=jochen@chromium.org

Bug: 1030692
Change-Id: I82a8a9bae9e97783569265ac57f7bed61f627fbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2012965
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734499}

chrome/test/BUILD.gn

@@ -5022,7 +5022,6 @@ test("unit_tests") {
 
   if (enable_captive_portal_detection) {
     sources += [
-      "../browser/captive_portal/captive_portal_service_unittest.cc",
       "../browser/captive_portal/captive_portal_tab_helper_unittest.cc",
       "../browser/captive_portal/captive_portal_tab_reloader_unittest.cc",
     ]

components/BUILD.gn

@@ -218,6 +218,7 @@ test("components_unittests") {
       "//components/autofill/content/browser:unit_tests",
       "//components/autofill/content/renderer:unit_tests",
       "//components/autofill/core/common/mojom:unit_tests",
+      "//components/captive_portal/content:unit_tests",
       "//components/cast_certificate:unit_tests",
       "//components/cast_channel:unit_tests",
       "//components/certificate_transparency:unit_tests",

components/captive_portal/content/BUILD.gn

@@ -28,3 +28,25 @@ source_set("content") {
     "//content/public/browser",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = []
+
+  if (enable_captive_portal_detection) {
+    sources += [ "captive_portal_service_unittest.cc" ]
+  }
+  deps = [
+    ":content",
+    "//base",
+    "//base/test:test_config",
+    "//base/test:test_support",
+    "//components/captive_portal/core",
+    "//components/captive_portal/core:test_support",
+    "//components/embedder_support",
+    "//components/prefs:test_support",
+    "//content/test:test_support",
+    "//net",
+    "//testing/gtest",
+  ]
+}

components/captive_portal/content/DEPS

@@ -4,6 +4,7 @@ include_rules = [
   "+components/keyed_service/core",
   "+components/prefs",
   "+content/public/browser",
+  "+content/public/test",
   "+services/network/public/cpp",
   "+net",
   "+url",