Make content_shell_test fit isolate naming convention.

content/content_shell_test_apk_run.isolate

Index: content/content_shell_test_apk_run.isolate
diff --git a/content/content_shell_test_apk_run.isolate b/content/content_shell_test_apk_run.isolate
deleted file mode 100644
index 8c01eb4dd7eadd4106d3f33984ce647394de4f4a..0000000000000000000000000000000000000000
--- a/content/content_shell_test_apk_run.isolate
+++ /dev/null
@@ -1,25 +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.
-{
-  'includes': [
-    '../build/android/android.isolate',
-    'content_shell_test_apk.isolate',
-  ],
-  'variables': {
-    'command': [
-      '<(PRODUCT_DIR)/bin/run_content_shell_test_apk',
-      '--enable-platform-mode',
-      '-e', 'local',
-      '--logcat-output-dir', '${ISOLATED_OUTDIR}/logcats',
-    ],
-    'files': [
-      '../third_party/proguard/',
-      '<(PRODUCT_DIR)/apks/ContentShell.apk',
-      '<(PRODUCT_DIR)/apks/ContentShellTest.apk',
-      '<(PRODUCT_DIR)/bin/run_content_shell_test_apk',
-      '<(PRODUCT_DIR)/test.lib.java/ContentShellTest.jar',
-      'content_shell_test_apk.isolate',
-    ]
-  },
-}