Remove GYP files in breakpad, build, and tools.

tools/android/audio_focus_grabber/audio_focus_grabber.gyp

-# 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.
-{
-  'targets': [
-    {
-      # GN: //tools/android/audio_focus_grabber:audio_focus_grabber_apk
-      'target_name': 'audio_focus_grabber_apk',
-      'type': 'none',
-      'variables': {
-        'apk_name': 'AudioFocusGrabber',
-        'android_manifest_path': 'java/AndroidManifest.xml',
-        'java_in_dir': 'java',
-        'resource_dir': 'java/res',
-      },
-      'dependencies': [
-        '../../../base/base.gyp:base_java',
-        '../../../third_party/android_tools/android_tools.gyp:android_support_v13_javalib'
-      ],
-      'includes': [ '../../../build/java_apk.gypi' ],
-  }]
-}