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 e385877a67f1d65e2739145f06b57ca7b7642c17..75337039f09edc32d5eb84ccf1e12e36744f92cb 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -609,16 +609,7 @@ 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() {