Webview tag creation should be using storage partitions.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index a41d56575d882457b693903b626f5960fe582cfb..14ab94e40f999fb941235a024381bcb19ed3491b 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -608,16 +608,7 @@ net::URLRequestContextGetter* TestingProfile::GetRequestContextForRenderProcess(
     int renderer_child_id) {
   content::RenderProcessHost* rph = content::RenderProcessHost::FromID(
       renderer_child_id);
-  content::StoragePartition* storage_partition = rph->GetStoragePartition();
-
-  // TODO(nasko): Remove this conditional, once webview tag creates a proper
-  // storage partition.
-  if (rph->IsGuest()) {
-    return GetRequestContextForStoragePartition(
-        storage_partition->GetPath(), true);
-  }
-
-  return storage_partition->GetURLRequestContext();
+  return rph->GetStoragePartition()->GetURLRequestContext();
 }
 
 void TestingProfile::CreateRequestContext() {