In-browser DNS-based service discovery system

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 094b7e216d4a814b56c15473bae6d9360c9a9a75..26a65c86d8020ca30d8c2eca5d3027193c3db229 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -123,6 +123,14 @@
         # Set ARM architecture version.
         'arm_version%': 7,
 
+
+        # MDNS is disabled by default.
+        'enable_mdns%' : 0,
+
+        # DNS-SD is disabled by default
+        'enable_service_discovery%': 0,
+
+
         'conditions': [
           # Set default value of toolkit_views based on OS.
           ['OS=="win" or chromeos==1 or use_aura==1', {
@@ -192,6 +200,8 @@
       'branding%': '<(branding)',
       'arm_version%': '<(arm_version)',
       'linux_lsb_release%': '<(linux_lsb_release)',
+      'enable_mdns%' : '<(enable_mdns)',
+      'enable_service_discovery%' : '<(enable_service_discovery)',
 
       # Set to 1 to enable fast builds. Set to 2 for even faster builds
       # (it disables debug info for fastest compilation - only for use
@@ -680,6 +690,9 @@
         }, {
           'use_openmax_dl_fft%': 0,
         }],
+        [ 'enable_service_discovery == 1', {
+              'enable_mdns': 1,
+        }],
       ],
 
       # Set this to 1 to enable use of concatenated impulse responses
@@ -829,6 +842,8 @@
     'spdy_proxy_auth_origin%': '<(spdy_proxy_auth_origin)',
     'spdy_proxy_auth_property%': '<(spdy_proxy_auth_property)',
     'spdy_proxy_auth_value%': '<(spdy_proxy_auth_value)',
+    'enable_mdns%' : '<(enable_mdns)',
+    'enable_service_discovery%' : '<(enable_service_discovery)',
 
     # Use system mesa instead of bundled one.
     'use_system_mesa%': 0,
@@ -1087,9 +1102,6 @@
     # rlz codes for searches but do not use the library.
     'enable_rlz%': 0,
 
-    # MDNS is disabled by default.
-    'enable_mdns%' : 0,
-
     'conditions': [
       # The version of GCC in use, set later in platforms that use GCC and have
       # not explicitly chosen to build with clang. Currently, this means all
@@ -2240,7 +2252,10 @@
       }],
       ['enable_mdns==1', {
         'defines': ['ENABLE_MDNS=1'],
-      }]
+      }],
+      ['enable_service_discovery==1', {
+        'defines': ['ENABLE_SERVICE_DISCOVERY=1'],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['enable_wexit_time_destructors==1', {