Revert of GN: Make breakpad_unittests & sandbox_linux_unittests use test()

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 775 matching lines @@
 
     deps = [
       "//third_party/WebKit/public:all_blink",
     ]
 
     # NOTE: The following deps are needed to run the layout tests
     # (run-webkit-tests) but there is no GN target for the layout tests,
     # so we need to specify the dependencies here instead.
     if (is_android) {
       deps += [
-        "//breakpad:breakpad_unittests",
+        "//breakpad:breakpad_unittests_deps",
         "//breakpad:dump_syms($host_toolchain)",
         "//breakpad:microdump_stackwalk($host_toolchain)",
         "//breakpad:minidump_dump($host_toolchain)",
         "//breakpad:minidump_stackwalk($host_toolchain)",
         "//breakpad:symupload($host_toolchain)",
         "//content/shell/android:content_shell_apk",
         "//tools/imagediff($host_toolchain)",
       ]
     } else {
       deps += [
@@ skipping 95 matching lines @@
   assert(target_name != "")  # Mark as used.
   sources = invoker.actual_sources
   assert(
       sources == invoker.actual_sources,
       "Do not use a platform name in your output directory (found \"$root_build_dir\"). http://crbug.com/548283")
 }
 
 assert_valid_out_dir("_unused") {
   actual_sources = [ "$root_build_dir/foo" ]
 }