WebUI: Leverage resource_path for jstemplate_compiled.js grd entry.

By using the new |resource_path| attribute an unnecessary intermediate
ui/webui/resources/js/jstemplate_compiled.js file which was using
<include> and |flattenhtml| is eliminated.

Bug: 1132403
Change-Id: I74c1c33b567df3023ccba2b0fed87da097ff37ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2470332
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817062}

ui/webui/resources/PRESUBMIT.py

@@ -71,9 +71,7 @@ def _CheckWebDevStyle(input_api, output_api):
     cwd = input_api.PresubmitLocalPath()
     sys.path += [input_api.os_path.join(cwd, '..', '..', '..', 'tools')]
     from web_dev_style import presubmit_support
-    IGNORELIST = ['ui/webui/resources/js/jstemplate_compiled.js']
-    file_filter = lambda f: f.LocalPath() not in IGNORELIST
-    results += presubmit_support.CheckStyle(input_api, output_api, file_filter)
+    results += presubmit_support.CheckStyle(input_api, output_api)
   finally:
     sys.path = old_sys_path
   return results

ui/webui/resources/js/jstemplate_compiled.js

-// Copyright (c) 2012 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 file serves as a proxy to bring the included js file from /third_party
-// into its correct location under the resources directory tree, whence it is
-// delivered via a chrome://resources URL.  See ../webui_resources.grd.
-
-// Note: this <include> is not behind a single-line comment because the first
-// line of the file is source code (so the first line would be skipped) instead
-// of a licence header.
-// clang-format off
-<include src="../../../../third_party/jstemplate/jstemplate_compiled.js">

ui/webui/resources/webui_resources.grd

@@ -16,8 +16,9 @@ without changes to the corresponding grd file. -->
       <if expr="chromeos">
         <include name="IDR_WEBUI_JS_I18N_TEMPLATE_PROCESS_JS" file="js/i18n_template_process.js" type="BINDATA" />
       </if>
-      <include name="IDR_WEBUI_JS_JSTEMPLATE_COMPILED_JS" file="js/jstemplate_compiled.js"
-               flattenhtml="true" type="BINDATA"/>
+      <include name="IDR_WEBUI_JS_JSTEMPLATE_COMPILED_JS"
+               file="../../../third_party/jstemplate/jstemplate_compiled.js"
+               resource_path="js/jstemplate_compiled.js" type="BINDATA"/>
       <!-- Roboto Font. Roboto-Regular and Roboto-Light is already available on
            Android, and Roboto-Medium is not used on Android. All 6 weights of
            Roboto are available on Chrome OS.-->