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

content/public/browser/browser_context.h

Index: content/public/browser/browser_context.h
diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index 0a022e4066e8162fe546133dfb22acf869ed1398..7ff172d5447b8f4803e1d39ba095ef2ad2dab97a 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -31,6 +31,7 @@ class SpecialStoragePolicy;
 
 namespace content {
 
+class BlobHandle;
 class BrowserPluginGuestManager;
 class DownloadManager;
 class DownloadManagerDelegate;
@@ -45,6 +46,8 @@ class StoragePartition;
 // 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
@@ -77,6 +80,11 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
   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