mac: Simplify infoplist_strings_util by using base/ more heavily

Also rename the binary to match the name of the source file.

No behavior change.

Bug: 1147069
Change-Id: I61ffe9e1e1672db4e5f1d954949e196cca7fc701
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583382Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835691}

chrome/BUILD.gn

@@ -492,7 +492,7 @@ if (is_win) {
   }
 
   compiled_action("chrome_app_strings") {
-    tool = "//chrome/tools/build/mac:infoplist_strings_tool"
+    tool = "//chrome/tools/build/mac:infoplist_strings_util"
 
     inputs = []
 

chrome/tools/build/mac/BUILD.gn

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-executable("infoplist_strings_tool") {
+executable("infoplist_strings_util") {
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
   sources = [ "infoplist_strings_util.mm" ]