Add probe to warm data reduction proxy

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 544 matching lines @@
 
       # Platform sends memory pressure signals natively.
       'native_memory_pressure_signals%': 0,
 
       'data_reduction_fallback_host%' : '',
       'data_reduction_dev_host%' : '',
       'spdy_proxy_auth_origin%' : '',
       'spdy_proxy_auth_property%' : '',
       'spdy_proxy_auth_value%' : '',
       'data_reduction_proxy_probe_url%' : '',
+      'data_reduction_proxy_warmup_url%' : '',
       'data_reduction_proxy_ssl_origin%' : '',
       'data_reduction_proxy_alt_origin%' : '',
       'data_reduction_proxy_alt_fallback_origin%' : '',
       'enable_mdns%' : 0,
       'enable_service_discovery%': 0,
       'enable_wifi_bootstrapping%': 0,
       'enable_hangout_services_extension%': 0,
 
        # Enable the Syzygy optimization step.
       'syzygy_optimize%': 0,
@@ skipping 343 matching lines @@
         }],
 
         # By default, use ICU data file (icudtl.dat) on all platforms
         # except when building Android WebView.
         # TODO(jshin): Handle 'use_system_icu' on Linux (Chromium).
         # Set the data reduction proxy origin for Android Webview.
         ['android_webview_build==0', {
           'icu_use_data_file_flag%' : 1,
           'spdy_proxy_auth_origin%': '',
           'data_reduction_proxy_probe_url%': '',
+          'data_reduction_proxy_warmup_url%': '',
           'data_reduction_dev_host%': '',
           'data_reduction_fallback_host%': '',
         }, {
           'icu_use_data_file_flag%' : 0,
           'spdy_proxy_auth_origin%': 'https://proxy.googlezip.net:443/',
           'data_reduction_proxy_probe_url%': 'http://check.googlezip.net/connect',
+          'data_reduction_proxy_warmup_url%': 'http://www.gstatic.com/generate_204',
           'data_reduction_dev_host%': 'http://proxy-dev.googlezip.net:80/',
           'data_reduction_fallback_host%': 'http://compress.googlezip.net:80/',
         }],
         ['OS=="win" or OS=="mac"', {
             'enable_wifi_bootstrapping%' : 1,
         }],
       ],
 
       # Set this to 1 to enable use of concatenated impulse responses
       # for the HRTF panner in WebAudio.
@@ skipping 167 matching lines @@
     'google_default_client_secret%': '<(google_default_client_secret)',
     'enable_managed_users%': '<(enable_managed_users)',
     'native_discardable_memory%': '<(native_discardable_memory)',
     'native_memory_pressure_signals%': '<(native_memory_pressure_signals)',
     'data_reduction_fallback_host%': '<(data_reduction_fallback_host)',
     'data_reduction_dev_host%': '<(data_reduction_dev_host)',
     'spdy_proxy_auth_origin%': '<(spdy_proxy_auth_origin)',
     'spdy_proxy_auth_property%': '<(spdy_proxy_auth_property)',
     'spdy_proxy_auth_value%': '<(spdy_proxy_auth_value)',
     'data_reduction_proxy_probe_url%': '<(data_reduction_proxy_probe_url)',
+    'data_reduction_proxy_warmup_url%': '<(data_reduction_proxy_warmup_url)',
     'data_reduction_proxy_ssl_origin%' : '<(data_reduction_proxy_ssl_origin)',
     'data_reduction_proxy_alt_origin%' : '<(data_reduction_proxy_alt_origin)',
     'data_reduction_proxy_alt_fallback_origin%' : '<(data_reduction_proxy_alt_fallback_origin)',
     'enable_mdns%' : '<(enable_mdns)',
     'enable_service_discovery%' : '<(enable_service_discovery)',
     'enable_wifi_bootstrapping%': '<(enable_wifi_bootstrapping)',
     'enable_hangout_services_extension%' : '<(enable_hangout_services_extension)',
     'v8_optimized_debug%': '<(v8_optimized_debug)',
     'proprietary_codecs%': '<(proprietary_codecs)',
     'use_goma%': '<(use_goma)',
@@ skipping 1611 matching lines @@
       ['spdy_proxy_auth_property != ""', {
         'defines': ['SPDY_PROXY_AUTH_PROPERTY="<(spdy_proxy_auth_property)"'],
       }],
       ['spdy_proxy_auth_value != ""', {
         'defines': ['SPDY_PROXY_AUTH_VALUE="<(spdy_proxy_auth_value)"'],
       }],
       ['data_reduction_proxy_probe_url != ""', {
         'defines': [
           'DATA_REDUCTION_PROXY_PROBE_URL="<(data_reduction_proxy_probe_url)"'],
       }],
+      ['data_reduction_proxy_warmup_url != ""', {
+        'defines': [
+          'DATA_REDUCTION_PROXY_WARMUP_URL="<(data_reduction_proxy_warmup_url)"'],
+      }],
       ['data_reduction_proxy_ssl_origin != ""', {
         'defines': [
           'DATA_REDUCTION_PROXY_SSL_ORIGIN="<(data_reduction_proxy_ssl_origin)"'],
       }],
       ['data_reduction_proxy_alt_origin != ""', {
         'defines': [
           'DATA_REDUCTION_PROXY_ALT_ORIGIN="<(data_reduction_proxy_alt_origin)"'],
       }],
       ['data_reduction_proxy_alt_fallback_origin != ""', {
         'defines': [
@@ skipping 2701 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',
   },
 }