WebUI: Auto-generate grd entries for ui/webui/resources/roboto.

Bug: 1132403
Change-Id: I6e8ebf06f0d11d7525fee509c450001f51285b3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2594170
Commit-Queue: John Lee <johntlee@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: John Lee <johntlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837810}

ui/webui/resources/BUILD.gn

@@ -27,6 +27,18 @@ generate_grd("build_grd") {
     "$target_gen_dir/js/resources.grdp",
   ]
 
+  if (!is_chromeos && !is_android) {
+    # 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.
+    input_files_base_dir = rebase_path(".", "//")
+    input_files = [
+      "roboto/roboto-bold.woff2",
+      "roboto/roboto-medium.woff2",
+      "roboto/roboto-regular.woff2",
+    ]
+  }
+
   if (include_polymer) {
     deps += [
       "cr_components:build_grdp",

ui/webui/resources/webui_resources.grd

@@ -16,14 +16,6 @@ without changes to the corresponding grd file. -->
       <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.-->
-      <if expr="not is_android and not chromeos">
-        <include name="IDR_WEBUI_ROBOTO_ROBOTO_REGULAR_WOFF2" file="roboto/roboto-regular.woff2" type="BINDATA" />
-        <include name="IDR_WEBUI_ROBOTO_ROBOTO_MEDIUM_WOFF2" file="roboto/roboto-medium.woff2" type="BINDATA" />
-        <include name="IDR_WEBUI_ROBOTO_ROBOTO_BOLD_WOFF2" file="roboto/roboto-bold.woff2" type="BINDATA" />
-      </if>
     </includes>
     <structures>
       <structure name="IDR_WEBUI_CSS_MENU_CSS"