Rename source_prereqs to inputs in the GN build.

chrome/common/BUILD.gn

 # Copyright 2014 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.
 
 import("//tools/grit/grit_rule.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("../chrome_common.gypi") ],
     "scope",
@@ skipping 89 matching lines @@
 
     lastchange_path = "//build/util/LASTCHANGE"
     version_path = "//chrome/VERSION"
     template_input_path = "chrome_version_info_posix.h.version"
     if (is_chrome_branded) {
       branding_path = "//chrome/app/theme/google_chrome/BRANDING"
     } else {
       branding_path = "//chrome/app/theme/chromium/BRANDING"
     }
 
-    source_prereqs = [
+    inputs = [
       version_path,
       template_input_path,
       lastchange_path,
       branding_path,
     ]
 
     outfile = "$target_gen_dir/chrome_version_info_posix.h"
     outputs = [ outfile ]
 
     args = [
@@ skipping 40 matching lines @@
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//third_party/widevine/cdm:version_h",
     # TODO(GYP)
     #'../components/components.gyp:bookmarks_common',
     #'../components/nacl.gyp:nacl_switches',
   ]
 }