Componentize safe_browsing: move threat_details* to component.

components/safe_browsing/browser/BUILD.gn

Index: components/safe_browsing/browser/BUILD.gn
diff --git a/components/safe_browsing/browser/BUILD.gn b/components/safe_browsing/browser/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..66d20484a8383399bf30c373d5a1131b19768f59
--- /dev/null
+++ b/components/safe_browsing/browser/BUILD.gn
@@ -0,0 +1,26 @@
+# 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.
+
+import("//build/config/features.gni")
+
+source_set("browser") {
+  sources = [
+    "threat_details.cc",
+    "threat_details.h",
+    "threat_details_cache.cc",
+    "threat_details_cache.h",
+    "threat_details_history.cc",
+    "threat_details_history.h",
+  ]
+
+  deps = [
+    "//components/data_use_measurement/core:core",
+    "//components/history/core/browser:browser",
+    "//components/safe_browsing:csd_proto",
+    "//components/safe_browsing:safe_browsing",
+    "//components/safe_browsing/common:common",
+    "//components/security_interstitials/content:security_interstitial_page",
+    "//content/public/browser:browser",
+  ]
+}