Add minidump fuzzer for breakpad.

testing/libfuzzer/fuzzer_test.gni

 # Copyright 2015 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.
 
 # Defines fuzzer_test.
 #
 import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//testing/test.gni")
 
@@ skipping 90 matching lines @@
           "$root_build_dir/$config_name",
         ]
       }
       test_deps += [ ":" + config_name ]
     }
 
     test(target_name) {
       forward_variables_from(invoker,
                              [
                                "check_includes",
+                               "defines",
                                "include_dirs",
                                "sources",
                              ])
       deps = test_deps
 
       if (defined(invoker.additional_configs)) {
         configs += invoker.additional_configs
       }
       configs += [ "//testing/libfuzzer:fuzzer_test_config" ]
 
@@ skipping 16 matching lines @@
     if (defined(invoker.dict)) {
       assert(invoker.dict == [] || invoker.dict != [])
     }
     if (defined(invoker.libfuzzer_options)) {
       assert(invoker.libfuzzer_options == [] || invoker.libfuzzer_options != [])
     }
     if (defined(invoker.seed_corpus)) {
       assert(invoker.seed_corpus == [] || invoker.seed_corpus != [])
     }
     assert(!defined(invoker.check_includes) || invoker.check_includes != [])
+    assert(!defined(invoker.include_dirs) || invoker.include_dirs != [])
+    assert(!defined(invoker.defines) || invoker.defines != [])
 
     group(target_name) {
     }
   }
 }