Add brotli content-encoding filter.

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 579 matching lines @@
 
       # Enables support for background apps.
       'enable_background%': 1,
 
       # Enable the task manager by default.
       'enable_task_manager%': 1,
 
       # Enables used resource whitelist generation; disabled by default.
       'enable_resource_whitelist_generation%': 0,
 
+      # Enable BROTLI support by default.
+      'disable_brotli_support%': 0,
+
       # Enable FILE support by default.
       'disable_file_support%': 0,
 
       # Enable FTP support by default.
       'disable_ftp_support%': 0,
 
       # Use of precompiled headers on Windows.
       #
       # This variable may be explicitly set to 1 (enabled) or 0
       # (disabled) in ~/.gyp/include.gypi or via the GYP command line.
@@ skipping 231 matching lines @@
         # Enable hotwording on Chrome-branded ChromeOS builds.
         ['branding=="Chrome" and chromeos==1', {
           'enable_hotwording%': 1,
         }],
 
         ['OS=="android"', {
           'enable_webrtc%': 1,
         }],
 
         ['OS=="ios"', {
+          'disable_brotli_support%': 1,
           'disable_ftp_support%': 1,
           'enable_extensions%': 0,
           'enable_google_now%': 0,
           'cld2_table_size%': 0,
           'enable_basic_printing%': 0,
           'enable_print_preview%': 0,
           'enable_session_service%': 0,
           'enable_spellcheck%': 0,
           'enable_themes%': 0,
           'enable_webrtc%': 0,
@@ skipping 339 matching lines @@
     'use_canvas_skia%': '<(use_canvas_skia)',
     'test_isolation_mode%': '<(test_isolation_mode)',
     'enable_basic_printing%': '<(enable_basic_printing)',
     'enable_print_preview%': '<(enable_print_preview)',
     'enable_spellcheck%': '<(enable_spellcheck)',
     'use_browser_spellchecker%': '<(use_browser_spellchecker)',
     'enable_google_now%': '<(enable_google_now)',
     'cld_version%': '<(cld_version)',
     'cld2_table_size%': '<(cld2_table_size)',
     'enable_captive_portal_detection%': '<(enable_captive_portal_detection)',
+    'disable_brotli_support%': '<(disable_brotli_support)',
     'disable_file_support%': '<(disable_file_support)',
     'disable_ftp_support%': '<(disable_ftp_support)',
     'enable_task_manager%': '<(enable_task_manager)',
     'sas_dll_path%': '<(sas_dll_path)',
     'wix_path%': '<(wix_path)',
     'use_libjpeg_turbo%': '<(use_libjpeg_turbo)',
     'use_system_libjpeg%': '<(use_system_libjpeg)',
     'android_channel%': '<(android_channel)',
     'icu_use_data_file_flag%': '<(icu_use_data_file_flag)',
     'gyp_managed_install%': 0,
@@ skipping 1779 matching lines @@
       }],
       ['enable_captive_portal_detection==1', {
         'defines': ['ENABLE_CAPTIVE_PORTAL_DETECTION=1'],
       }],
       ['enable_app_list==1', {
         'defines': ['ENABLE_APP_LIST=1'],
       }],
       ['enable_settings_app==1', {
         'defines': ['ENABLE_SETTINGS_APP=1'],
       }],
+      ['disable_brotli_support==1', {
+        'defines': ['DISABLE_BROTLI_SUPPORT=1'],
+      }],
       ['disable_file_support==1', {
         'defines': ['DISABLE_FILE_SUPPORT=1'],
       }],
       ['disable_ftp_support==1', {
         'defines': ['DISABLE_FTP_SUPPORT=1'],
       }],
       ['enable_supervised_users==1', {
         'defines': ['ENABLE_SUPERVISED_USERS=1'],
       }],
       ['enable_mdns==1', {
@@ skipping 3332 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',
   },
 }