Disable Blink assertions on Chromecast device builds

third_party/WebKit/Source/config.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/ui.gni")
 import("//third_party/WebKit/public/features.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 } else {
   # TODO(brettw) remove this once && early-out is checked in.
   arm_version = 0
 }
 
 declare_args() {
   # Set to true to enable the clang plugin that checks the usage of the Blink
   # garbage-collection infrastructure during compilation.
   blink_gc_plugin = true
+
+  # If true, force blink asserts to be off in a release build.  When false,
+  # blink asserts in release build may be controlled by DCHECK_ALWAYS_ON.
+  blink_asserts_off_in_release = false
 }
 
 # Whether Android ARM or x86 build uses OpenMAX DL FFT. Currently only
 # supported on Android ARMv7+, ia32 or x64 without webview. When enabled, this
 # will also enable WebAudio support on Android ARM, ia32 and x64. Default is
 # enabled. Whether WebAudio is actually available depends on runtime settings
 # and flags.
 use_openmax_dl_fft =
     is_android &&
     (current_cpu == "x86" || current_cpu == "x64" ||
@@ skipping 51 matching lines @@
     "ENABLE_WEB_AUDIO=1",
   ]
 }
 
 if (use_default_render_theme) {
   feature_defines_list += [ "WTF_USE_DEFAULT_RENDER_THEME=1" ]
 }
 if (enable_oilpan) {
   feature_defines_list += [ "ENABLE_OILPAN=1" ]
 }
+if (blink_asserts_off_in_release && !is_debug) {
+  feature_defines_list += [ "ENABLE_ASSERT=0" ]
+}
 
 # feature_defines_string -------------------------------------------------------
 
 # Convert the list to a space-separated string for passing to scripts.
 # This would be the equivalent of passing '<(feature_defines)' in GYP.
 feature_defines_string =
     exec_script("build/gn_list_to_space_separated_string.py",
                 feature_defines_list,
                 "trim string")