Call CSD whitelist checking on UI thread and record UMA

components/safe_browsing/password_protection/BUILD.gn

Index: components/safe_browsing/password_protection/BUILD.gn
diff --git a/components/safe_browsing/password_protection/BUILD.gn b/components/safe_browsing/password_protection/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..c6016331140abb47a8c66eb70d797acf65ae312e
--- /dev/null
+++ b/components/safe_browsing/password_protection/BUILD.gn
@@ -0,0 +1,35 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+source_set("pp_service") {

[blundell, 2017/03/02 15:54:02]

nit: you should just call these targets password_protection and
password_protection_unittests respectively. You'll then be able to reference the
password_protection target in GN just as

//components/safe_browsing/password_protection

[Jialiu Lin, 2017/03/02 19:02:50]

Done.

+  sources = [
+    "password_protection_service.cc",
+    "password_protection_service.h",
+  ]
+
+  deps = [
+    "//base:base",
+    "//components/history/core/browser:browser",
+    "//components/safe_browsing_db:database_manager",
+    "//content/public/browser:browser",
+    "//third_party/protobuf:protobuf_lite",
+  ]
+}
+
+source_set("pp_service_unittest") {
+  testonly = true
+  sources = [
+    "password_protection_service_unittest.cc",
+  ]
+  deps = [
+    ":pp_service",
+    "//base",
+    "//base/test:test_support",
+    "//components/safe_browsing_db:test_database_manager",
+    "//content/test:test_support",
+    "//testing/gmock",
+    "//testing/gtest",
+    "//third_party/protobuf:protobuf_lite",
+  ]
+}