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

content/public/browser/browser_context.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include "base/callback_forward.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 13 matching lines @@
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace quota {
 class SpecialStoragePolicy;
 }
 
 namespace content {
 
+class BlobHandle;
 class BrowserPluginGuestManager;
 class DownloadManager;
 class DownloadManagerDelegate;
 class GeolocationPermissionContext;
 class IndexedDBContext;
 class ResourceContext;
 class SiteInstance;
 class StoragePartition;
 
 // This class holds the context needed for a browsing session.
 // It lives on the UI thread. All these methods must only be called on the UI
 // thread.
 class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
  public:
+  typedef base::Callback<void(scoped_ptr<BlobHandle>)> BlobCallback;

[jam, 2014/05/14 17:14:00]

nit: convention in content api is to put the callback right above the method
that uses it, so move this to line 83

[tommycli, 2014/05/14 18:07:05]

Done.

+
   static DownloadManager* GetDownloadManager(BrowserContext* browser_context);
 
   // Returns BrowserContext specific external mount points. It may return NULL
   // if the context doesn't have any BrowserContext specific external mount
   // points. Currenty, non-NULL value is returned only on ChromeOS.
   static fileapi::ExternalMountPoints* GetMountPoints(BrowserContext* context);
 
   static content::StoragePartition* GetStoragePartition(
       BrowserContext* browser_context, SiteInstance* site_instance);
   static content::StoragePartition* GetStoragePartitionForSite(
@@ skipping 12 matching lines @@
   static void GarbageCollectStoragePartitions(
       BrowserContext* browser_context,
       scoped_ptr<base::hash_set<base::FilePath> > active_paths,
       const base::Closure& done);
 
   // DON'T USE THIS. GetDefaultStoragePartition() is going away.
   // Use GetStoragePartition() instead. Ask ajwong@ if you have problems.
   static content::StoragePartition* GetDefaultStoragePartition(
       BrowserContext* browser_context);
 
+  // |callback| returns a NULL scoped_ptr on failure.
+  static void CreateMemoryBackedBlob(BrowserContext* browser_context,
+                                     const char* data, size_t length,
+                                     const BlobCallback& callback);
+
   // Ensures that the corresponding ResourceContext is initialized. Normally the
   // BrowserContext initializs the corresponding getters when its objects are
   // created, but if the embedder wants to pass the ResourceContext to another
   // thread before they use BrowserContext, they should call this to make sure
   // that the ResourceContext is ready.
   static void EnsureResourceContextInitialized(BrowserContext* browser_context);
 
   // Tells the HTML5 objects on this context to persist their session state
   // across the next restart.
   static void SaveSessionState(BrowserContext* browser_context);
@@ skipping 96 matching lines @@
 struct hash<content::BrowserContext*> {
   std::size_t operator()(content::BrowserContext* const& p) const {
     return reinterpret_cast<std::size_t>(p);
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 #endif
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_