Enable WebAudio support on Android/x86.

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 749 matching lines @@
         # again.
         # NOTE: The check for disable_nacl==0 and component=="static_library"
         # can't be used here because these variables are not defined yet, but it
         # is still not supported.
         ['OS!="mac" and OS!="ios" and OS!="android" and chromeos==0', {
           'test_isolation_mode%': 'check',
         }, {
           'test_isolation_mode%': 'noop',
         }],
         # Whether Android ARM build uses OpenMAX DL FFT.
-        ['OS=="android" and target_arch=="arm" and android_webview_build==0', {
-          # Currently only supported on Android ARM, without webview.
-          # When enabled, this will also enable WebAudio on Android
-          # ARM.  Default is enabled.
+        ['OS=="android" and (target_arch=="arm" or target_arch=="ia32") and android_webview_build==0', {
+          # When set to 1, use_openmax_dl_fft will also make WebAudio
+          # available on Android. However, chrome://flags controls whether
+          # WebAudio is actually enabled.
           'use_openmax_dl_fft%': 1,
         }, {
           'use_openmax_dl_fft%': 0,
         }],
         ['OS=="win" or OS=="linux"', {
             'enable_mdns%' : 1,
         }],
 
         # Turns on compiler optimizations in V8 in Debug build, except
         # on android_clang, where we're hitting a weird linker error.
@@ skipping 862 matching lines @@
       }],
       ['image_loader_extension==1', {
         'grit_defines': ['-D', 'image_loader_extension'],
       }],
       ['remoting==1', {
         'grit_defines': ['-D', 'remoting'],
       }],
       ['use_titlecase_in_grd_files==1', {
         'grit_defines': ['-D', 'use_titlecase'],
       }],
+      ['OS=="android" and target_arch=="ia32"', {
+        # WebAudio on Android/x86 is disabled by default, unlike
+        # everywhere else, so use appropriate message.
+        'grit_defines': ['-D', 'use_webaudio_enable_message'],
+      }],
       ['use_third_party_translations==1', {
         'grit_defines': ['-D', 'use_third_party_translations'],
         'locales': [
           'ast', 'bs', 'ca@valencia', 'en-AU', 'eo', 'eu', 'gl', 'hy', 'ia',
           'ka', 'ku', 'kw', 'ms', 'ug'
         ],
       }],
       ['OS=="android"', {
         'grit_defines': ['-t', 'android',
                          '-E', 'ANDROID_JAVA_TAGGED_ONLY=true'],
@@ skipping 3079 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }