Fix Linux installer dependencies on nacl_helper.

chrome/installer/linux/BUILD.gn

Index: chrome/installer/linux/BUILD.gn
diff --git a/chrome/installer/linux/BUILD.gn b/chrome/installer/linux/BUILD.gn
index 1605dea55c4bbd7d799593928009070cfb2ca934..7520f209ec1a59768d76a98ecbf7b4ea2c2ad061 100644
--- a/chrome/installer/linux/BUILD.gn
+++ b/chrome/installer/linux/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
+import("//build/config/features.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
 
@@ -144,10 +145,12 @@ group("installer_deps") {
     ":theme_files",
     "//chrome",
     "//chrome:packed_resources",
-    "//components/nacl:nacl_helper",
     "//sandbox/linux:chrome_sandbox",
     "//third_party/adobe/flash:flapper_binaries",
   ]
+  if (enable_nacl) {
+    public_deps += [ "//components/nacl:nacl_helper" ]
+  }
   if (current_cpu == "x86" || current_cpu == "x64") {
     public_deps += [
       "//third_party/widevine/cdm:widevinecdm",