Add support building with OpenMAX DL FFT for WebAudio

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 89 matching lines @@
 
         # Default architecture we're building for is the architecture we're
         # building on.
         'target_arch%': '<(host_arch)',
 
         # Sets whether we're building with the Android SDK/NDK (and hence with
         # Ant, value 0), or as part of the Android system (and hence with the
         # Android build system, value 1).
         'android_build_type%': 0,
 
+        # Sets whether Android uses ARM FFT.  Default is no.
+        'use_arm_fft%': 0,
+
         # Sets whether chrome is built for google tv device.
         'google_tv%': 0,
 
         'conditions': [
           # Set default value of toolkit_views based on OS.
           ['OS=="win" or chromeos==1 or use_aura==1', {
             'toolkit_views%': 1,
           }, {
             'toolkit_views%': 0,
           }],
@@ skipping 50 matching lines @@
       'enable_hidpi%': '<(enable_hidpi)',
       'enable_touch_ui%': '<(enable_touch_ui)',
       'android_build_type%': '<(android_build_type)',
       'google_tv%': '<(google_tv)',
       'enable_app_list%': '<(enable_app_list)',
       'enable_message_center%': '<(enable_message_center)',
       'use_default_render_theme%': '<(use_default_render_theme)',
       'enable_web_intents%': 0,  # TODO(thakis): Remove, http://crbug.com/173194
       'buildtype%': '<(buildtype)',
 
+      'use_arm_fft%': '<(use_arm_fft)',
+      
       # We used to provide a variable for changing how libraries were built.
       # This variable remains until we can clean up all the users.
       # This needs to be one nested variables dict in so that dependent
       # gyp files can make use of it in their outer variables.  (Yikes!)
       # http://code.google.com/p/chromium/issues/detail?id=83308
       'library%': 'static_library',
 
       # Override branding to select the desired branding flavor.
       'branding%': 'Chromium',
 
@@ skipping 408 matching lines @@
           # where possible to reduce ROM size.
           'use_system_libjpeg%': '<(android_build_type)',
         }],
 
         # Enable Settings App only on Windows.
         ['enable_app_list==1 and OS=="win"', {
           'enable_settings_app%': 1,
         }, {
           'enable_settings_app%': 0,
         }],
-
         ['OS=="linux" and target_arch=="arm" and chromeos==0', {
           # Set some defaults for arm/linux chrome builds
           'armv7%': 1,
           'linux_breakpad%': 0,
           'linux_use_tcmalloc%': 0,
           'linux_use_gold_flags%': 0,
           # sysroot needs to be an absolute path otherwise it generates
           # incorrect results when passed to pkg-config
           'sysroot%': '<!(cd <(DEPTH) && pwd -P)/arm-sysroot',
         }], # OS=="linux" and target_arch=="arm" and chromeos==0
@@ skipping 129 matching lines @@
     'google_default_client_id%': '<(google_default_client_id)',
     'google_default_client_secret%': '<(google_default_client_secret)',
     'enable_managed_users%': '<(enable_managed_users)',
 
     # Use system mesa instead of bundled one.
     'use_system_mesa%': 0,
 
     # Use system nspr instead of the bundled one.
     'use_system_nspr%': 0,
 
+    # Use ARM FFT if requested 
+    'use_arm_fft%': '<(use_arm_fft)',
+
     # Use system protobuf instead of bundled one.
     'use_system_protobuf%': 0,
 
     # Use system yasm instead of bundled one.
     'use_system_yasm%': 0,
 
     # Default to enabled PIE; this is important for ASLR but we may need to be
     # able to turn it off for various reasons.
     'linux_disable_pie%': 0,
 
@@ skipping 382 matching lines @@
         # Location of the "strip" binary, used by both gyp and scripts.
         'android_strip%' : '<!(/bin/echo -n <(android_toolchain)/*-strip)',
 
         # Provides an absolute path to PRODUCT_DIR (e.g. out/Release). Used
         # to specify the output directory for Ant in the Android build.
         'ant_build_out': '`cd <(PRODUCT_DIR) && pwd -P`',
 
         # Always uses openssl.
         'use_openssl%': 1,
 
+        'use_arm_fft%': '<(use_arm_fft)',

[Paweł Hajdan Jr., 2013/02/27 17:56:58]

Why so many deep repetitions?

Isn't it sufficient to just put the 0 here?

         'proprietary_codecs%': '<(proprietary_codecs)',
         'enable_task_manager%': 0,
         'safe_browsing%': 2,
         'configuration_policy%': 0,
         'input_speech%': 0,
         'enable_automation%': 0,
         'java_bridge%': 1,
         'build_ffmpegsumo%': 0,
         'linux_use_tcmalloc%': 0,
 
@@ skipping 2870 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',
   },
 }