Revert of Add a GN flag for the Windows multi-dll build.

content/public/app/BUILD.gn

Index: content/public/app/BUILD.gn
diff --git a/content/public/app/BUILD.gn b/content/public/app/BUILD.gn
index d75b59e3a552ac0aef016a386c36c0235882caad..20ee710e738714299487eec447301bc5fae05f3b 100644
--- a/content/public/app/BUILD.gn
+++ b/content/public/app/BUILD.gn
@@ -19,8 +19,6 @@
 #   //content/public/app:child (group; "browser" and "both" ones look the same)
 #     //content (shared library) ->
 #       //content/public/app:both_sources (source set)
-
-import("//build/config/chrome_build.gni")
 
 public_app_shared_sources = [
   "content_jni_onload.h",
@@ -93,7 +91,10 @@
            ]
   }
 
-  if (is_multi_dll_chrome) {
+  # TODO(GYP) enable chrome_multiple_dll support
+  is_chrome_multiple_dll = false
+
+  if (is_chrome_multiple_dll) {
     source_set("browser") {
       check_includes = false  # See comment above.