[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 50346d15e95bf48bfb2c395c6d7b0acfabc3c6b9..e96377e1ad79edc370b280002f14a54ad563e93a 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.