Move the unit tests files side-by-side with the corresponding .cc files.

components/update_client/BUILD.gn

Index: components/update_client/BUILD.gn
diff --git a/components/update_client/BUILD.gn b/components/update_client/BUILD.gn
index 176657210e9233174397bb34ed8c281dbf8d6cc0..d4e612593356f201f0feab168bd575ca5d5bc0d4 100644
--- a/components/update_client/BUILD.gn
+++ b/components/update_client/BUILD.gn
@@ -65,12 +65,12 @@ source_set("update_client") {
 source_set("test_support") {
   testonly = true
   sources = [
-    "test/test_configurator.cc",
-    "test/test_configurator.h",
-    "test/test_installer.cc",
-    "test/test_installer.h",
-    "test/url_request_post_interceptor.cc",
-    "test/url_request_post_interceptor.h",
+    "test_configurator.cc",
+    "test_configurator.h",
+    "test_installer.cc",
+    "test_installer.h",
+    "url_request_post_interceptor.cc",
+    "url_request_post_interceptor.h",
   ]
 
   deps = [
@@ -86,13 +86,13 @@ source_set("test_support") {
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "test/component_patcher_unittest.cc",
-    "test/crx_downloader_unittest.cc",
-    "test/ping_manager_unittest.cc",
-    "test/request_sender_unittest.cc",
-    "test/update_checker_unittest.cc",
-    "test/update_client_unittest.cc",
-    "test/update_response_unittest.cc",
+    "component_patcher_unittest.cc",
+    "crx_downloader_unittest.cc",
+    "ping_manager_unittest.cc",
+    "request_sender_unittest.cc",
+    "update_checker_unittest.cc",
+    "update_client_unittest.cc",
+    "update_response_unittest.cc",
   ]
 
   deps = [