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

breakpad/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.
 
 config("tools_config") {
   include_dirs = [ "src", "src/third_party" ]
   if (is_android) {
     defines = [ "__ANDROID__" ]
   }
   if (is_clang) {
@@ skipping 13 matching lines @@
   }
 }
 
 config("client_config") {
   include_dirs = [ "src" ]
   if (is_android) {
     include_dirs += [ "src/common/android/include" ]
   }
 }
 
+config("handler_config") {
+  include_dirs = [
+    "src",
+  ]
+}
 
 # minidump_stackwalk and minidump_dump are tool-type executables that do
 # not build on iOS.
 if (current_toolchain == host_toolchain && !is_win) {
   executable("minidump_stackwalk") {
     sources = [
       "src/processor/basic_code_module.h",
       "src/processor/basic_code_modules.cc",
       "src/processor/basic_code_modules.h",
       "src/processor/basic_source_line_resolver.cc",
@@ skipping 606 matching lines @@
     ]
   }
 
   # TODO(GYP) There is some XCode-only targets like ninja-breakpad.
 }
 
 if (is_win) {
   group("client") {
     direct_dependent_configs = [ ":client_config" ]
   }
+
+  source_set("breakpad_handler") {
+    configs += [ ":handler_config" ]
+    if (is_win) {
+      direct_dependent_configs = [ ":handler_config" ]
+    }
+
+    defines = [ "BREAKPAD_NO_TERMINATE_THREAD" ]
+
+    sources = [
+      "src/client/windows/crash_generation/client_info.cc",
+      "src/client/windows/crash_generation/client_info.h",
+      "src/client/windows/crash_generation/crash_generation_client.cc",
+      "src/client/windows/crash_generation/crash_generation_client.h",
+      "src/client/windows/crash_generation/crash_generation_server.cc",
+      "src/client/windows/crash_generation/crash_generation_server.h",
+      "src/client/windows/handler/exception_handler.cc",
+      "src/client/windows/handler/exception_handler.h",
+      "src/common/windows/guid_string.cc",
+      "src/common/windows/guid_string.h",
+      "src/google_breakpad/common/minidump_format.h",
+      "src/client/windows/crash_generation/minidump_generator.cc",
+      "src/client/windows/crash_generation/minidump_generator.h",
+      "src/common/windows/string_utils-inl.h",
+    ]
+  }
 }