Make blink_headers depend on mojo_bindings

third_party/WebKit/public/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("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//tools/grit/grit_rule.gni")
 
 blink_headers_values = exec_script("//build/gypi_to_gn.py",
                                    [ rebase_path("blink_headers.gypi") ],
@@ skipping 111 matching lines @@
 # Depend on this target to use public blink API headers for things like enums
 # and public structures without actually linking against any Blink libraries.
 source_set("blink_headers") {
   public_configs = [
     ":blink_headers_config",
 
     # Blink exposes icu headers in the public API.
     "//third_party/icu:icu_config",
   ]
   sources = blink_headers_values.blink_public_sources
+  deps = [
+    ":generate_mojo_bindings",
+  ]
 }
 
 # GYP version: WebKit/public/blink_devtools.gyp:blink_devtools_frontend_resources
 group("blink_devtools_frontend_resources") {
   public_deps = [
     "//third_party/WebKit/Source/devtools:devtools_frontend_resources",
   ]
 }
 
 # GYP version: WebKit/public/blink_devtools.gyp:blink_generate_devtools_grd
@@ skipping 60 matching lines @@
 }
 
 if (is_android) {
   # GYP version: WebKit/public/blink.gyp:android_mojo_bindings_java
   mojom("android_mojo_bindings") {
     sources = [
       "platform/modules/payments/payment_request.mojom",
     ]
   }
 }
+
+group("generate_mojo_bindings") {
+  deps = [
+    ":mojo_bindings__generator",
+    ":mojo_bindings_blink__generator",
+  ]
+}