Mandoline: Implement basic "process per site" support

mojo/services/network/url_loader_impl.cc

Index: mojo/services/network/url_loader_impl.cc
diff --git a/mojo/services/network/url_loader_impl.cc b/mojo/services/network/url_loader_impl.cc
index e2e88a1b43b1cd1ebbd77fa06747ddd5ec6175f0..f9590f148937fabff3989e952c9cfb6b442cf8c4 100644
--- a/mojo/services/network/url_loader_impl.cc
+++ b/mojo/services/network/url_loader_impl.cc
@@ -13,6 +13,7 @@
 #include "net/base/elements_upload_data_stream.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
+#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/redirect_info.h"
@@ -21,10 +22,46 @@
 namespace mojo {
 namespace {
 
+GURL GetSiteForURL(const GURL& url) {
+  // If the url has a host, then determine the site.
+  if (url.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 = url.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);
+    }
+    return site;
+  }
+
+  // If there is no host but there is a scheme, return the scheme.
+  // This is useful for cases like file URLs.
+  if (url.has_scheme())
+    return GURL(url.scheme() + ":");
+
+  // Otherwise the URL should be invalid; return an empty site.
+  DCHECK(!url.is_valid());
+  return GURL();
+}
+
 // Generates an URLResponsePtr from the response state of a net::URLRequest.
 URLResponsePtr MakeURLResponse(const net::URLRequest* url_request) {
   URLResponsePtr response(URLResponse::New());
   response->url = String::From(url_request->url());
+  response->site = GetSiteForURL(url_request->url()).spec();
 
   const net::HttpResponseHeaders* headers = url_request->response_headers();
   if (headers) {