Disable Blink assertions on Chromecast device builds

third_party/WebKit/Source/wtf/BUILD.gn

Index: third_party/WebKit/Source/wtf/BUILD.gn
diff --git a/third_party/WebKit/Source/wtf/BUILD.gn b/third_party/WebKit/Source/wtf/BUILD.gn
index 5db6483ad7b9d821a0b5f3b3fd338a72ae725fc8..38a73d6994e61233b5d9e5350c549072a9aaee6d 100644
--- a/third_party/WebKit/Source/wtf/BUILD.gn
+++ b/third_party/WebKit/Source/wtf/BUILD.gn
@@ -4,6 +4,11 @@
 
 import("//testing/test.gni")
 
+declare_args() {
+  # Forces assertions to be disabled.
+  disable_wtf_assertions = false
+}
+
 # The list of files is kept in the .gypi.
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("wtf.gypi") ],
@@ -13,6 +18,8 @@ gypi_values = exec_script("//build/gypi_to_gn.py",
 visibility = [ "//third_party/WebKit/*" ]
 
 config("wtf_config") {
+  defines = []
+
   if (is_win) {
     defines = [

[slan, 2015/12/17 02:44:12]

This needs to be defines += or GN will yell at you on Win builds.

       "__STD_C",
@@ -38,6 +45,10 @@ config("wtf_config") {
       cflags += [ "/wd4291" ]
     }
   }
+
+  if (disable_wtf_assertions) {
+    defines += [ "ENABLE_ASSERT=0" ]

[slan, 2015/12/17 02:44:12]

Any target that has this macro in *.h files should include this as a
public_config. Any target which has this macro in just *.cc files should include
it as a config.

+  }
 }
 
 component("wtf") {