[build] Conditionally print to stdout on Android

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("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 import("gni/v8.gni")
 import("gni/isolate.gni")
 import("//build_overrides/v8.gni")
 
 import("snapshot_toolchain.gni")
 
 declare_args() {
+  # Print to stdout on Android.
+  v8_android_log_stdout = false
+
   # Sets -DVERIFY_HEAP.
   v8_enable_verify_heap = false
 
   # Enable compiler warnings when using V8_DEPRECATED apis.
   v8_deprecation_warnings = false
 
   # Enable compiler warnings when using V8_DEPRECATE_SOON apis.
   v8_imminent_deprecation_warnings = ""
 
   # Embeds the given script into the snapshot.
@@ skipping 274 matching lines @@
   }
   if (v8_current_cpu == "x64") {
     defines += [ "V8_TARGET_ARCH_X64" ]
     if (is_win) {
       # Increase the initial stack size. The default is 1MB, this is 2MB. This
       # applies only to executables and shared libraries produced by V8 since
       # ldflags are not pushed to dependants.
       ldflags += [ "/STACK:2097152" ]
     }
   }
+  if (is_android && v8_android_log_stdout) {
+    defines += [ "V8_ANDROID_LOG_STDOUT" ]
+  }
 
   # TODO(jochen): Support v8_enable_prof on Windows.
   # TODO(jochen): Add support for compiling with simulators.
 
   if (is_debug) {
     if (is_linux && v8_enable_backtrace) {
       ldflags += [ "-rdynamic" ]
     }
 
     # TODO(jochen): Add support for different debug optimization levels.
@@ skipping 2205 matching lines @@
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [ ":internal_config" ]
 }
 
 v8_fuzzer("wasm_asmjs_fuzzer") {
 }