Fixing guest processes to use the proper storage partition.

content/browser/storage_partition_impl_map.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/storage_partition_impl_map.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "base/stl_util.h"
@@ skipping 186 matching lines @@
 }
 
 StoragePartitionImpl* StoragePartitionImplMap::Get(
     const std::string& partition_id) {
   // Find the previously created partition if it's available.
   std::map<std::string, StoragePartitionImpl*>::const_iterator it =
       partitions_.find(partition_id);
   if (it != partitions_.end())
     return it->second;
 
-  // There was no previous partition, so let's make a new one.
+  // There was no previous partition, so let's make a new one. The storage
+  // partition should be in memory for guest processes and OTR profiles.
+  bool in_memory = browser_context_->IsOffTheRecord() ||
+      StartsWithASCII(partition_id, "guest-", true);
+
   StoragePartitionImpl* partition =
       StoragePartitionImpl::Create(browser_context_, partition_id,
-                                   browser_context_->GetPath());
+                                   browser_context_->GetPath(),
+                                   in_memory);
   partitions_[partition_id] = partition;
 
   // These calls must happen after StoragePartitionImpl::Create().
   partition->SetURLRequestContext(
       partition_id.empty() ?
       browser_context_->GetRequestContext() :
       browser_context_->GetRequestContextForStoragePartition(partition_id));
   partition->SetMediaURLRequestContext(
       partition_id.empty() ?
       browser_context_->GetMediaRequestContext() :
@@ skipping 51 matching lines @@
 
     // We do not call InitializeURLRequestContext() for media contexts because,
     // other than the HTTP cache, the media contexts share the same backing
     // objects as their associated "normal" request context.  Thus, the previous
     // call serves to initialize the media request context for this storage
     // partition as well.
   }
 }
 
 }  // namespace content