Revert of Turn components/crash into a layered component.

components/crash/tools/BUILD.gn

Index: components/crash/tools/BUILD.gn
diff --git a/components/crash/tools/BUILD.gn b/components/crash/tools/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..82f282bfdd17af536ea347e6d8c22edf75ec29db
--- /dev/null
+++ b/components/crash/tools/BUILD.gn
@@ -0,0 +1,18 @@
+# Copyright 2014 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.
+
+if (is_win) {
+  source_set("crash_service") {
+    sources = [
+      "crash_service.cc",
+      "crash_service.h",
+    ]
+
+    deps = [
+      "//base",
+      "//breakpad:breakpad_handler",
+      "//breakpad:breakpad_sender",
+    ]
+  }
+}