Implement browser-side host resolver Mojo service.

net/interfaces/proxy_resolver_service.mojom

Index: net/interfaces/proxy_resolver_service.mojom
diff --git a/net/interfaces/proxy_resolver_service.mojom b/net/interfaces/proxy_resolver_service.mojom
index 2cb7a0b7857616bf81c7e028a7f9e3ad9df478da..a2fb70e54b34295c7c8d5a61b14deefc7074eb78 100644
--- a/net/interfaces/proxy_resolver_service.mojom
+++ b/net/interfaces/proxy_resolver_service.mojom
@@ -27,7 +27,7 @@ struct ProxyServer {
   uint16 port;
 };
 
-interface ProxyResolverService {
+interface ProxyResolver {
   SetPacScript(string data) => (int32 result);
 
   // Use a ProxyResolverRequestClient instead of returning a result so we can
@@ -43,6 +43,6 @@ interface ProxyResolverRequestClient {
 
 interface ProxyResolverFactory {
   // TODO(amistry): Add NetLog and ProxyResolverErrorObserver.
-  CreateResolver(ProxyResolverService& resolver,
-                 HostResolverService host_resolver);
+  CreateResolver(ProxyResolver& resolver,
+                 HostResolver host_resolver);
 };