Enable WebAudio on ARM64 and MIPS

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 5b15e70db934c48f668345ed59f78af641f1d96f..bf3be0a668b4a64ad2d53262a944990477ca16c2 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -887,11 +887,11 @@
         }, {
           'test_isolation_mode%': 'noop',
         }],
-        # Whether Android ARM or x86 build uses OpenMAX DL FFT.
-        ['OS=="android" and ((target_arch=="arm" and arm_version >= 7) or target_arch=="ia32" or target_arch=="x64")', {
-          # Currently only supported on Android ARMv7+, ia32 or x64.
+        # Whether Android build uses OpenMAX DL FFT.
+        ['OS=="android" and ((target_arch=="arm" and arm_version >= 7) or target_arch=="ia32" or target_arch=="x64" or target_arch=="arm64" or target_arch=="mipsel")', {
+          # Currently only supported on Android ARMv7+, ARM64, ia32, x64 and mipsel.
           # When enabled, this will also enable WebAudio support on
-          # Android ARM, ia32 and x64.  Default is enabled.  Whether
+          # Android for these architectures.  Default is enabled.  Whether
           # WebAudio is actually available depends on runtime settings
           # and flags.
           'use_openmax_dl_fft%': 1,