Hook up chrome.exe manifest in the Windows GN build.

chrome/version.gni

 # 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("//build/config/chrome_build.gni")
 
 # Runs the version processing script over the given template file to produce
 # an output file. This is used for generating various forms of files that
 # incorporate the product name and version.
 #
@@ skipping 18 matching lines @@
 #     list the 'source' (see above) as well as any extra_variable_files.
 #
 #   output:
 #     File name of file to write. In GYP this is unspecified and it will
 #     make up a file name for you based on the input name, and tack on
 #     "_version.rc" to the end. But in GN you need to specify the full name.
 #
 #   template_file (optional):
 #     Template file to use (not a list). Defaults to
 #     //chrome/app/chrome_version.rc.version if unspecified.
+#     TODO(brettw) remove this default behavior and specify it every time.
 #
 #   extra_args (optional):
 #     Extra arguments to pass to version.py. Any "-f <filename>" args should
 #     use sources instead.
 #
+#   process_only (optional, defaults to false)
+#     Set to generate only one action that processes the version file and
+#     doesn't attempt to link the result into a source set. This is for if
+#     you are processing the version as data only.
+#
 #   visibility (optional)
 #
 # Example:
 #   process_version("myversion") {
 #     sources = [ "myfile.h.in" ]
 #     output = "$target_gen_dir/myfile.h"
 #     extra_args = ["-e", "FOO=42"]
 #     extra_files = [ "foo/BRANDING" ]
 #   }
 template("process_version") {
   assert(defined(invoker.sources) || defined(invoker.template_file),
          "Either sources or template_file must be defined for $target_name")
   assert(defined(invoker.output), "Output must be defined for $target_name")
 
-  action_name = target_name + "_action"
-  source_set_name = target_name
+  process_only = defined(invoker.process_only) && invoker.process_only
+
+  if (process_only) {
+    action_name = target_name
+  } else {
+    action_name = target_name + "_action"
+    source_set_name = target_name
+  }
 
   action(action_name) {
-    visibility = [ ":$source_set_name" ]
     script = "//build/util/version.py"
 
     lastchange_path = "//build/util/LASTCHANGE"
     version_path = "//chrome/VERSION"
     if (is_chrome_branded) {
       branding_path = "//chrome/app/theme/google_chrome/BRANDING"
     } else {
       branding_path = "//chrome/app/theme/chromium/BRANDING"
     }
     if (defined(invoker.template_file)) {
@@ skipping 33 matching lines @@
       "-f",
       rebase_path(lastchange_path, root_build_dir),
     ]
     if (defined(invoker.extra_args)) {
       args += invoker.extra_args
     }
     args += [
       rebase_path(template_path, root_build_dir),
       rebase_path(invoker.output, root_build_dir),
     ]
+
+    if (process_only) {
+      # When processing only, visibility gets applied to this target.
+      if (defined(invoker.visibility)) {
+        visibility = invoker.visibility
+      }
+    } else {
+      # When linking the result, only the source set can depend on the action.
+      visibility = [ ":$source_set_name" ]
+    }
   }
 
-  source_set(source_set_name) {
-    if (defined(invoker.visibility)) {
-      visibility = invoker.visibility
+  if (!process_only) {
+    source_set(source_set_name) {
+      if (defined(invoker.visibility)) {
+        visibility = invoker.visibility
+      }
+      sources = get_target_outputs(":$action_name")
+      public_deps = [
+        ":$action_name",
+      ]
     }
-    sources = get_target_outputs(":$action_name")
-    public_deps = [
-      ":$action_name",
-    ]
   }
 }