Mark gtest and gmock as testonly in GN.

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 462 matching lines @@
     ]
 
     include_dirs = [
       "src",
       "src/client",
       "src/third_party/linux/include",
       ".",
     ]
   }
 
-  executable("breakpad_unittests") {
+  test("breakpad_unittests") {
     sources = [
       "linux/breakpad_googletest_includes.h",
       "src/client/linux/handler/exception_handler_unittest.cc",
       "src/client/linux/minidump_writer/cpu_set_unittest.cc",
       "src/client/linux/minidump_writer/directory_reader_unittest.cc",
       "src/client/linux/minidump_writer/line_reader_unittest.cc",
       "src/client/linux/minidump_writer/linux_core_dumper_unittest.cc",
       "src/client/linux/minidump_writer/linux_ptrace_dumper_unittest.cc",
       "src/client/linux/minidump_writer/minidump_writer_unittest.cc",
       "src/client/linux/minidump_writer/minidump_writer_unittest_utils.cc",
@@ skipping 41 matching lines @@
 
 
     if (is_android) {
       sources += [ "src/common/android/breakpad_getcontext_unittest.cc" ]
       libs = [ "log" ]
       include_dirs = [ "src/common/android/include" ]
     }
   }
 
   executable("linux_dumper_unittest_helper") {
+    testonly = true
     sources = [
       "src/client/linux/minidump_writer/linux_dumper_unittest_helper.cc",
     ]
     deps = [
       ":processor_support",
     ]
 
     include_dirs = [
       "src",
     ]
 
     if (cpu_arch == "mipsel" && is_android) {
       include_dirs += [ "src/common/android/include" ]
     }
   }
 
 
   executable("generate_test_dump") {
+    testonly = true
     sources = [
       "linux/generate-test-dump.cc",
     ]
 
     # This file has an unused variable warning.
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
 
     deps = [ ":client" ]
 
@@ skipping 108 matching lines @@
       "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",
     ]
   }
 }