GN(android) Fix oscilloscope crash in webaudio on arm64

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.
+# Whether Android build uses OpenMAX DL FFT. Currently supported only on
+# ARMv7+, ARM64, x86 or x64 without webview. Also enables WebAudio support.
+# Whether WebAudio is actually available depends on runtime settings and flags.
 use_openmax_dl_fft =
-    is_android &&
-    (current_cpu == "x86" || current_cpu == "x64" ||
-     (current_cpu == "arm" && arm_version >= 7) || current_cpu == "mipsel")
+    is_android && (current_cpu == "x86" || current_cpu == "x64" ||
+                   (current_cpu == "arm" && arm_version >= 7) ||
+                   current_cpu == "arm64" || current_cpu == "mipsel")
 
 use_webaudio_ffmpeg = !is_mac && !is_android
 
 # Set this to true to enable use of concatenated impulse responses for the HRTF
 # panner in WebAudio.
 # TODO(brettw) do we need this or can we assume its always on?
 use_concatenated_impulse_responses = true
 
 # feature_defines_list ---------------------------------------------------------
 
@@ skipping 45 matching lines @@
 }
 
 # 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")