Blobs: Mechanism for creating Blobs in browser process, then transferring to renderer.

content/browser/browser_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/public/browser/browser_context.h"
 
 #if !defined(OS_IOS)
 #include "content/browser/download/download_manager_impl.h"
+#include "content/browser/fileapi/chrome_blob_storage_context.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/storage_partition_impl_map.h"
 #include "content/common/child_process_host_impl.h"
+#include "content/public/browser/blob_handle.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/site_instance.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/cookies/cookie_store.h"
 #include "net/ssl/server_bound_cert_service.h"
 #include "net/ssl/server_bound_cert_store.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "webkit/browser/database/database_tracker.h"
@@ skipping 166 matching lines @@
     return;
 
   partition_map->ForEach(callback);
 }
 
 StoragePartition* BrowserContext::GetDefaultStoragePartition(
     BrowserContext* browser_context) {
   return GetStoragePartition(browser_context, NULL);
 }
 
+void BrowserContext::CreateMemoryBackedBlob(BrowserContext* browser_context,
+                                            const char* data, size_t length,
+                                            const BlobCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  ChromeBlobStorageContext* blob_context =
+      ChromeBlobStorageContext::GetFor(browser_context);
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&ChromeBlobStorageContext::CreateMemoryBackedBlob,
+                 make_scoped_refptr(blob_context), data, length),
+      callback);
+}
+
 void BrowserContext::EnsureResourceContextInitialized(BrowserContext* context) {
   // This will be enough to tickle initialization of BrowserContext if
   // necessary, which initializes ResourceContext. The reason we don't call
   // ResourceContext::InitializeResourceContext() directly here is that
   // ResourceContext initialization may call back into BrowserContext
   // and when that call returns it'll end rewriting its UserData map. It will
   // end up rewriting the same value but this still causes a race condition.
   //
   // See http://crbug.com/115678.
   GetDefaultStoragePartition(context);
@@ skipping 34 matching lines @@
 #endif  // !OS_IOS
 
 BrowserContext::~BrowserContext() {
 #if !defined(OS_IOS)
   if (GetUserData(kDownloadManagerKeyName))
     GetDownloadManager(this)->Shutdown();
 #endif
 }
 
 }  // namespace content