Mandoline: Implement basic "process per site" support

mojo/services/network/network_service_impl.cc

Index: mojo/services/network/network_service_impl.cc
diff --git a/mojo/services/network/network_service_impl.cc b/mojo/services/network/network_service_impl.cc
index 661f7e0cf6f910523c69c04cf840e0633c2e89a6..1dd57100c8e10aef4e1104aa4bc0e9d40a4ffa9a 100644
--- a/mojo/services/network/network_service_impl.cc
+++ b/mojo/services/network/network_service_impl.cc
@@ -12,6 +12,7 @@
 #include "mojo/services/network/udp_socket_impl.h"
 #include "mojo/services/network/url_loader_impl.h"
 #include "mojo/services/network/web_socket_impl.h"
+#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 
 namespace mojo {
 
@@ -33,6 +34,48 @@ void NetworkServiceImpl::GetCookieStore(InterfaceRequest<CookieStore> store) {
   new CookieStoreImpl(context_, origin_, app_refcount_->Clone(), store.Pass());
 }
 
+void NetworkServiceImpl::GetSiteForURL(const String& url,
+                                       const GetSiteForURLCallback& callback) {
+  GURL gurl(url);
+  // If the url has a host, then determine the site.
+  if (gurl.has_host()) {
+    // Only keep the scheme and registered domain as given by GetOrigin.  This
+    // may also include a port, which we need to drop.
+    GURL site = gurl.GetOrigin();
+
+    // Remove port, if any.
+    if (site.has_port()) {
+      GURL::Replacements rep;
+      rep.ClearPort();
+      site = site.ReplaceComponents(rep);
+    }
+
+    // If this URL has a registered domain, we only want to remember that part.
+    std::string domain =
+        net::registry_controlled_domains::GetDomainAndRegistry(
+            url,
+            net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
+    if (!domain.empty()) {
+      GURL::Replacements rep;
+      rep.SetHostStr(domain);
+      site = site.ReplaceComponents(rep);
+    }
+    callback.Run(String::From(site.spec()));
+    return;
+  }
+
+  // If there is no host but there is a scheme, return the scheme.
+  // This is useful for cases like file URLs.
+  if (gurl.has_scheme()) {
+    callback.Run(String::From(GURL(gurl.scheme() + ":").spec()));
+    return;
+  }
+
+  // Otherwise the URL should be invalid; return an empty site.
+  DCHECK(!gurl.is_valid());
+  callback.Run(String());
+}
+
 void NetworkServiceImpl::CreateWebSocket(InterfaceRequest<WebSocket> socket) {
   new WebSocketImpl(context_, app_refcount_->Clone(), socket.Pass());
 }