[Sync] Fix test support targets + duplicate namespaces.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index a7ad30f266e1e7400b05aabe0b8991e926ad7908..0f223e43e2565f6dd4a5abe7d4e14f6fb8caab1f 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -113,7 +113,7 @@ static_library("test_support") {
     "//components/search_engines:test_support",
     "//components/signin/core/browser:test_support",
     "//components/sync",
-    "//components/sync:test_support_sync_driver",
+    "//components/sync:test_support_driver",
     "//components/sync_sessions:test_support",
     "//components/syncable_prefs:test_support",
     "//components/toolbar:test_support",
@@ -478,7 +478,7 @@ if (!is_android) {
       "//chrome/renderer",
       "//components/resources",
       "//components/sync",
-      "//components/sync:test_support_sync_model",
+      "//components/sync:test_support_model",
       "//content/app/resources",
       "//content/test:test_support",
       "//crypto:platform",
@@ -902,9 +902,9 @@ if (!is_android) {
       "//components/invalidation/impl",
       "//components/invalidation/impl:test_support",
       "//components/sync",
-      "//components/sync:test_support_sync_fake_server",
-      "//components/sync:test_support_sync_model",
-      "//components/sync:test_support_sync_testserver",
+      "//components/sync:test_support_fake_server",
+      "//components/sync:test_support_model",
+      "//components/sync:test_support_testserver",
       "//content/test:test_support",
       "//net",
       "//skia",
@@ -1225,7 +1225,7 @@ test("browser_tests") {
     ":repack_pseudo_locales",
     ":test_support",
     "//base",
-    "//components/sync:test_support_sync_model",
+    "//components/sync:test_support_model",
   ]
 
   data_deps = []
@@ -3406,9 +3406,8 @@ test("unit_tests") {
     "//components/browser_sync:test_support",
     "//components/content_settings/core/test:test_support",
     "//components/resources",
-    "//components/sync:test_support_sync_core",
-    "//components/sync:test_support_sync_core_impl",
-    "//components/sync:test_support_sync_model",
+    "//components/sync:test_support_driver",
+    "//components/sync:test_support_model",
     "//components/sync_sessions:test_support",
     "//content/public/app:both",
     "//content/test:test_support",