[Blob] Blob paging to disk patch.

content/browser/fileapi/chrome_blob_storage_context.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/fileapi/chrome_blob_storage_context.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "content/public/browser/blob_handle.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 19 matching lines @@
   ~BlobHandleImpl() override {}
 
   std::string GetUUID() override { return handle_->uuid(); }
 
  private:
   scoped_ptr<storage::BlobDataHandle> handle_;
 };
 
 }  // namespace
 
-ChromeBlobStorageContext::ChromeBlobStorageContext() {}
+ChromeBlobStorageContext::ChromeBlobStorageContext(bool disk_enabled)
+    : disk_enabled_(disk_enabled) {}
 
 ChromeBlobStorageContext* ChromeBlobStorageContext::GetFor(
     BrowserContext* context) {
   if (!context->GetUserData(kBlobStorageContextKeyName)) {
     scoped_refptr<ChromeBlobStorageContext> blob =
-        new ChromeBlobStorageContext();
+        new ChromeBlobStorageContext(!context->IsOffTheRecord());
     context->SetUserData(
         kBlobStorageContextKeyName,
         new UserDataAdapter<ChromeBlobStorageContext>(blob.get()));
     // Check first to avoid memory leak in unittests.
     if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           base::Bind(&ChromeBlobStorageContext::InitializeOnIOThread, blob));
     }
   }
 
   return UserDataAdapter<ChromeBlobStorageContext>::Get(
       context, kBlobStorageContextKeyName);
 }
 
 void ChromeBlobStorageContext::InitializeOnIOThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  context_.reset(new BlobStorageContext());
+  context_.reset(new BlobStorageContext(disk_enabled_));
 }
 
 scoped_ptr<BlobHandle> ChromeBlobStorageContext::CreateMemoryBackedBlob(
     const char* data, size_t length) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   std::string uuid(base::GenerateGUID());
   storage::BlobDataBuilder blob_data_builder(uuid);
   blob_data_builder.AppendData(data, length);
 
@@ skipping 33 matching lines @@
 void ChromeBlobStorageContext::DeleteOnCorrectThread() const {
   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
       !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
     return;
   }
   delete this;
 }
 
 }  // namespace content