[Android] Switch instrumentation tests to generated device isolates.

android_webview/system_webview_shell_test_apk.isolate

Index: android_webview/system_webview_shell_test_apk.isolate
diff --git a/android_webview/system_webview_shell_test_apk.isolate b/android_webview/system_webview_shell_test_apk.isolate
deleted file mode 100644
index dbea4bdd325fe5b18ae7fb6af1fe95e17eebddc3..0000000000000000000000000000000000000000
--- a/android_webview/system_webview_shell_test_apk.isolate
+++ /dev/null
@@ -1,15 +0,0 @@
-# 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.
-
-{
-  'variables': {
-    'files': [
-      '<(DEPTH)/android_webview/tools/system_webview_shell/test/data/',
-      '<(DEPTH)/third_party/WebKit/LayoutTests/virtual/stable/webexposed/global-interface-listing-expected.txt',
-      '<(DEPTH)/third_party/WebKit/LayoutTests/webexposed/global-interface-listing.html',
-      '<(DEPTH)/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt',
-      '<(DEPTH)/third_party/WebKit/LayoutTests/webexposed/resources/global-interface-listing.js',
-    ],
-  },
-}