NOT FOR LANDING: Thread the needle through all webmodules.

third_party/WebKit/Source/bindings/core/v8/BUILD.gn

Index: third_party/WebKit/Source/bindings/core/v8/BUILD.gn
diff --git a/third_party/WebKit/Source/bindings/core/v8/BUILD.gn b/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
index c557169793e4f48e4aa4d099398c55c3ab0e89c4..5ea2d6b63694b43c754cae2269d7c0f6515ecd32 100644
--- a/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
+++ b/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
@@ -252,6 +252,7 @@ if (is_win) {
 group("bindings_core_v8_generated") {
   public_deps = [
     ":bindings_core_impl_generated",
+    ":fake_gen",
   ]
   if (is_win) {
     public_deps += [ ":generate_bindings_core_v8_all_interfaces" ]
@@ -270,6 +271,55 @@ idl_compiler("generate_bindings_core_v8_interfaces") {
   target_component = "core"
 }
 
+action("fake_gen") {
+  input_dir = "//third_party/WebKit/fake_gen"
+  api_path = "web/api"
+  output_dir = "$root_gen_dir/blink/$api_path"
+
+  script_name = "$input_dir/fake_the_gen.py"
+
+  fake_gen_files = [
+    "document.cc",
+    "document.h",
+    "element.cc",
+    "element.h",
+    "node.cc",
+    "node.h",
+    "event.cc",
+    "event.h",
+    "event_target.cc",
+    "event_target.h",
+  ]
+
+  inputs = [
+    script_name,
+  ]
+  outputs = []
+  foreach(gen_file, fake_gen_files) {
+    inputs += [ "$input_dir/$api_path/$gen_file" ]
+    outputs += [ "$output_dir/$gen_file" ]
+  }
+  script = script_name
+
+  args = [ rebase_path("$output_dir") ]
+}
+
+source_set("fake_gen_compiled") {
+  deps = [
+    ":fake_gen",
+    "//skia",
+    "//third_party/WebKit/Source/wtf",
+    "//v8",
+  ]
+
+  sources = get_target_outputs(":fake_gen")
+
+  configs += [
+    "//third_party/WebKit/Source:config",
+    "//third_party/WebKit/Source/core:blink_core_pch",
+  ]
+}
+
 aggregate_generated_bindings("generate_bindings_core_v8_all_interfaces") {
   sources = core_definition_idl_files
   outputs = [