[WebView] Add an isolate file to run the WebView Layout tests.

android_webview/android_webview_test_apk_run.isolate

 # 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.
 {
   'includes': [
     '../build/android/android.isolate',
   ],
   'variables': {
     'command': [
       '<(PRODUCT_DIR)/bin/run_android_webview_test_apk',
-       '--enable-platform-mode',
-       '-e', 'local',
-       '--apk-under-test', '<(PRODUCT_DIR)/apks/AndroidWebView.apk',
-       '--logcat-output-dir', '${ISOLATED_OUTDIR}/logcats',
+      '--enable-platform-mode',
+      '-e', 'local',
+      '--apk-under-test', '<(PRODUCT_DIR)/apks/AndroidWebView.apk',
+      '--logcat-output-dir', '${ISOLATED_OUTDIR}/logcats',
     ],
     'files': [
       '../third_party/proguard/lib/proguard.jar',
       '<(PRODUCT_DIR)/host_forwarder',
       '<(PRODUCT_DIR)/forwarder_dist/',
       '<(PRODUCT_DIR)/android_webview_test_apk/',
       '<(PRODUCT_DIR)/apks/AndroidWebView.apk',
       '<(PRODUCT_DIR)/apks/AndroidWebViewTest.apk',
       '<(PRODUCT_DIR)/bin/run_android_webview_test_apk',
       '<(PRODUCT_DIR)/test.lib.java/AndroidWebViewTest.jar',
       'android_webview_test_apk.isolate',
       'test/data/',
     ]
   },
 }