Enable -Werror for links in chromecast builds.

build/config/chromecast/BUILD.gn

 # Copyright 2015 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/chromecast_build.gni")
 
 assert(is_chromecast)
 
 config("static_config") {
   ldflags = [
-    # We want to statically link libstdc++/libgcc.
-    "-static-libstdc++",
-    "-static-libgcc",
-
     # Don't allow visible symbols from libraries that contain
     # assembly code with symbols that aren't hidden properly.
     # http://b/26390825
     "-Wl,--exclude-libs=libffmpeg.a",
   ]
+
+  if (!is_android) {
+    ldflags += [
+      # We want to statically link libstdc++/libgcc on Linux.
+      # (On Android, libstdc++ and libgcc aren't used.)
+      "-static-libstdc++",
+      "-static-libgcc",
+    ]
+  }
 }
 
 config("ldconfig") {
   visibility = [ ":*" ]
 
   # Chromecast executables depend on several shared libraries in
   # /oem_cast_shlib, $ORIGIN, and $ORIGIN/lib. Add these rpaths to each binary.
   # This is explicitly disabled in Chrome for security reasons (see comments in
   # //build/config/gcc/BUILD.gn), but necessary on Chromecast so that OEM's may
   # override the default libraries shipped in the Cast receiver package.
@@ skipping 30 matching lines @@
     configs += [ ":static_config" ]
   }
 }
 
 config("shared_library_config") {
   configs = [ ":ldconfig" ]
   if (current_cpu == "arm") {
     configs += [ ":static_config" ]
   }
 }