[Media Router] Conditionally enable mDNS on Windows.

chrome/browser/media/router/media_router_mojo_impl.h

Index: chrome/browser/media/router/media_router_mojo_impl.h
diff --git a/chrome/browser/media/router/media_router_mojo_impl.h b/chrome/browser/media/router/media_router_mojo_impl.h
index 35ca51e2c872408614870b106f10dcdf9677ca10..06f400a87e67d75d3fc1cb85d72c2e54aea7ed48 100644
--- a/chrome/browser/media/router/media_router_mojo_impl.h
+++ b/chrome/browser/media/router/media_router_mojo_impl.h
@@ -99,6 +99,10 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   void AddIssue(const Issue& issue) override;
   void ClearIssue(const Issue::Id& issue_id) override;
 

[apacible, 2016/03/23 22:04:45]

nit: same comment on removing newlines.

[btolsch, 2016/03/24 01:44:03]

Done.

+  bool is_mdns_discovery_enabled() const override;
+
+  void EnableMdnsDiscovery() override;
+
   const std::string& media_route_provider_extension_id() const {
     return media_route_provider_extension_id_;
   }
@@ -381,6 +385,8 @@ class MediaRouterMojoImpl : public MediaRouterBase,
   // initial event page wakeup attempt.
   bool provider_version_was_recorded_ = false;
 
+  bool is_mdns_discovery_enabled_ = false;

[imcheng, 2016/03/24 01:17:19]

This should be true for non-Windows.

[btolsch, 2016/03/24 01:44:03]

Done.

+
   base::WeakPtrFactory<MediaRouterMojoImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);