[MediaRouter] The minimal change to make everything build on Android.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 923b8422a83ca631c9c3d95b74dcb23fb117a8a1..efe8c1cf008225ed482a948fdd2a767e5579ed91 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -876,6 +876,7 @@
           'enable_supervised_users%': 0,
           'enable_task_manager%': 0,
           'use_system_libcxx%': 1,
+          'enable_media_router%': 0,
         }],
 
         # Use GPU accelerated cross process image transport by default
@@ -947,10 +948,8 @@
 
         ['OS=="android" or OS=="ios"', {
           'enable_captive_portal_detection%': 0,
-          'enable_media_router%': 0,
         }, {
           'enable_captive_portal_detection%': 1,
-          'enable_media_router%': 1,
         }],
 
         # Enable Skia UI text drawing incrementally on different platforms.