BlobUrlBrowserTest: Add a test exercising blob: URLs from file:// documents.

content/browser/site_instance_impl.cc

Index: content/browser/site_instance_impl.cc
diff --git a/content/browser/site_instance_impl.cc b/content/browser/site_instance_impl.cc
index c12a0c79160a24dea7b2667816cb670fc4f89114..ac535c86914a5be0e40f3eba2403c906721ce3d8 100644
--- a/content/browser/site_instance_impl.cc
+++ b/content/browser/site_instance_impl.cc
@@ -292,10 +292,10 @@ scoped_refptr<SiteInstance> SiteInstance::CreateForURL(
 bool SiteInstance::IsSameWebSite(BrowserContext* browser_context,
                                  const GURL& real_src_url,
                                  const GURL& real_dest_url) {
+  GURL dest_url =
+      SiteInstanceImpl::GetEffectiveURL(browser_context, real_dest_url);
   GURL src_url = SiteInstanceImpl::GetEffectiveURL(browser_context,
                                                    real_src_url);
-  GURL dest_url = SiteInstanceImpl::GetEffectiveURL(browser_context,
-                                                    real_dest_url);
 
   // We infer web site boundaries based on the registered domain name of the
   // top-level page and the scheme.  We do not pay attention to the port if
@@ -312,19 +312,18 @@ bool SiteInstance::IsSameWebSite(BrowserContext* browser_context,
   if (!src_url.is_valid() || !dest_url.is_valid())
     return false;
 
-  // If the destination url is just a blank page, we treat them as part of the
-  // same site.
-  GURL blank_page(url::kAboutBlankURL);
-  if (dest_url == blank_page)
+  // If the destination url is just a blank page, a data: URL, or another page
+  // without an origin, we can't reason about its origin.
+  url::Origin dest_origin(dest_url);
+  if (dest_origin.unique())
     return true;
 
   // If the schemes differ, they aren't part of the same site.
-  if (src_url.scheme() != dest_url.scheme())
+  if (src_url.scheme() != dest_origin.scheme())
     return false;
 
   return net::registry_controlled_domains::SameDomainOrHost(
-      src_url,
-      dest_url,
+      src_url, dest_origin.GetURL(),
       net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
 }