gn win: Add breakpad_handler target, necessary to compile breakpad on win

components/breakpad/app/BUILD.gn

 # 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_android) {
   import("//build/config/android/config.gni")
 }
 
 source_set("lib") {
   sources = [
     "breakpad_client.cc",
     "breakpad_client.h",
     "crash_keys_win.cc",
     "crash_keys_win.h",
   ]
+
+  include_dirs = [
+    "../../../breakpad/src",
+  ]
 }
 
 # Note: if you depend on this target, you need to either link in
 # content.gyp:content_common, or add content/public/common/content_switches.cc
 # to your sources.
 #
 # GYP version: components/breakpad.gyp:breakpad_component
 source_set("app") {
   sources = [
     "breakpad_linux_impl.h",
@@ skipping 18 matching lines @@
   deps = [
     "//base",
     ":lib",
   ]
 
   if (is_mac) {
     deps += [ "//breakpad" ]
   } else if (is_win) {
     deps += [
       "//sandbox",
-      #'../breakpad/breakpad.gyp:breakpad_handler',  TODO(GYP)
+      "//breakpad:breakpad_handler",
       #'../breakpad/breakpad.gyp:breakpad_sender',  TODO(GYP)
     ]
   } else if (is_posix && !is_ios &&
              (!is_android || !is_android_webview_build)) {
     deps += [ "//breakpad:client" ]
   }
 }
 
 source_set("test_support") {
   deps = [ ":lib" ]
 }